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InsectCop Reviews: Banish Ants From Your Home With Terro Liquid Ant Killer


The Terro Liquid Ant Killer is an easy yet efficient way how to get rid of all the most common household ants quickly and fully.



  • Must be used with caution around pets and children
  • Must be re-applied every few days
  • Designed for mostly indoor use

As ant season approaches, we’ve already begun dreading the annual, summer-long battle against these tiny invaders. As much as we sweep, clean, and seal up our food stores, ants seem impossible to avoid completely and almost always find a way indoors.

That’s why, this year, we’re putting Terro Liquid Ant Killer to the test!

After scouring the web for the market’s best-rated ant repellent product, we’ve landed on Terro’s liquid formula. This easy-to-use product has won the approval of thousands of satisfied customers, but will it live up to the hype?

Read on for our independent, bias-free thoughts on Terro Liquid Ant Killer – the most comprehensive review of its kind!

Terro Liquid Ant Killer: The Basics

Terro Liquid Ant Killer is an insecticidal product designed to attract and kill ants. This not only takes care of any ants you’ve seen around your home but also deals with those lurking out of sight. Based in Lititz, Pennsylvania, the Terro Bug Killer Company deals with a long list of common household pests, but their success with ant control is what sets them apart.

Their liquid ant-killer is a non-organic, ready-to-use product with a proven track record in relieving people of their ant problems. Everything we’ve seen so far looks great, but is it the product for us?


Terro Liquid Ant Killer contains borax which, according to the research, is generally safe to use around humans. However, it may still have mildly toxic effects if ingested, so you should always take care to keep the product well away from children and pets.

This product won’t stain your clothes or other fabrics, but it does contain sugar and might be sticky. It may also solidify when exposed to air.

To clean up spills of Terro Liquid Ant Killer, simply:

  1. Soak a sponge or cloth with hot water.
  2. Place the hot, wet sponge or cloth over the spill.
  3. Leave it for one hour.
  4. Return to wipe up the product.

If you get the product on your clothes, rinse or sponge off the worst of it before running them through the washing machine as usual.


Terro Liquid Ant Killer is a highly effective product that offers long-lasting protection against ants. For the average household, a single bottle should last at least one ant season, and maybe two (provided it’s stored properly over winter).


The Terro Ant Killer comes in a clear, plastic dropper bottle packaged within an orange, white, and blue cardboard box.

The directions, safety precautions, and ingredients are all clearly displayed on both the outer and inner packaging. The liquid is easy to dispense and the product includes little cardboard tiles for even easier application.

You can buy Terro Liquid Ant Killer in either 1 or 2 Oz sized bottles.

The liquid itself

The active ingredient in Terro Liquid Ant Killer is Sodium Tetraborate Decahydrate (AKA borax) and accounts for 5.4% of the total ingredients. The other 94.6% is made up of inert ingredients (which includes sugar).

The liquid itself has a gel-like consistency. It is clear and colorless (so it won’t stain your fabrics!), though it may turn yellow or brown over time. This happens when the product is exposed to air or warmer temperatures, which can cause sugar in the product to crystallize and change color. This doesn’t change the effectiveness of the product, though – as long as it stays liquid and doesn’t solidify, it’ll still work!

That sugar gives the product a mildly sweet smell, though the odor isn’t strong or in any way overwhelming.

Application safety

The main thing to avoid with Terro Liquid Ant Killer is getting the product in your eyes, as this can cause irritation.

The product is unlikely to cause irritation if it gets on your skin, though, in rare cases, this may cause an allergic reaction.

First aid

  • What to do if you get Terro Liquid Ant Killer in your eyes?

If you get the product in your eyes, rinse them thoroughly with plenty of clean water, including beneath the eyelids. If the irritation persists, consult a doctor.

  • What to do if you get Terro Liquid Ant Killer on your skin?

Wash the affected area with soap and clean water. If you experience irritation or an allergic reaction, consult a doctor.

  • What to do if you accidentally swallow Terro Liquid Ant Killer?

Do not try to induce vomiting; instead, drink plenty of fresh water. If you feel unwell, consult a doctor.

  • What to do if you inhale Terro Liquid Ant Killer?

Move to an area with fresh air. If you feel unwell or experience respiratory problems, consult a doctor.

How does The Liquid Ant Killer work?

Terro liquid ant killer works by attracting and killing ants.

The gel contains sugar, which ants find irresistible. Once the bait is laid out, the sugary scent will attract every ant in the vicinity. The insects will appear in their hundreds to gather up the sweet, liquid bait, which they will then carry back to their nest for the colony to feast on.

Unfortunately for the ants, the gel also contains borax. Borax (AKA sodium borate) is a naturally-occurring, powdery, white mineral that was first discovered in the 8th century. This very useful substance has been used for decades as a household cleaning product, in chemical laboratories, in various anti-fungal medicines, and even to make slime.

When ingested by ants (and other bugs), borax acts as a stomach poison, disrupting their digestive system and ultimately killing them. However, it leaves the ants enough time to return to their nests with the poisoned bait, so the whole colony can be wiped out with a single application.

Terro Liquid Ant Killer effectively eliminates all types of common household ants, including:

  • Acrobat ants
  • Argentine ants
  • Big headed ants
  • Carpenter ants
  • Cornfield ants
  • Crazy ants
  • Ghost ants
  • Fire ants
  • Odorous house ants
  • Pavement ants
  • Pharaoh ants
  • Small black ants
  • White footed ants

Terro Liquid Ant Killer is most effective against ant species that favor sugary foods. Species like the thief ant (which prefers greasy food) may be less affected by it, though even ants with a savory tooth will eat sugary baits if they have access to them.

How to use the Terro Liquid Ant Killer for the best results

How to apply Terro Liquid Ant Killer

Terro Liquid Ant Killer comes ready-to-use and is very simple to apply, no need to mix or shake the product before you use it.

Simply tear the ‘Place TERRO here’ cardboard tiles along the perforated strips to remove them from the packaging and apply the liquid ant killer to the shiny side of the tile. You should use enough that the ant killer makes a little puddle on the tile.

Next, place the baited tiles on flat surfaces, in areas where you’ve noticed signs of ant activity.

Finally, leave the bait to do its work, but check on it every few days. You should add more if the bait dries up, or if the first batch starts to run low, but you shouldn’t touch baits if there are ants actively feeding on them.

The cardboard tiles aren’t an essential part of this process, but they do make clean-up a lot easier and will stop the ant killer from getting on other surfaces in your home.

If you run out of tiles, you can use small pieces of paper, card or foil instead.

Terro Liquid Ant Killer couldn’t be easier to use or clean up. The formula is ready-to-use and setting up the baits is a simple as squeezing out a few drops onto the cardboard tiles. Once you’re done with the treatment, these can be disposed of in the trash.

Where to apply Terro Liquid Ant Killer

Terro Liquid Ant Killer should be applied anywhere you have noticed ant activity, or wherever ants are likely to hang out.

This may include:

  • Along baseboards
  • In the corners of rooms
  • On countertops
  • In and around food cabinets
  • Around the edge of sinks and tubs
  • Beneath pipes
  • Beneath and behind appliances
  • On windowsills and around doorways
  • Near garbage cans
  • Along ant trails

The more baits you use, the better! Setting up lots of baits will maximize your chances of eliminating ants from your house completely.

This product is primarily intended for indoor use, as it is not weather-resistant and may not work as well outdoors. It might take care of ants on your patio and in your garden, but there are other products designed specifically for this purpose that may work better. Borax is thought to have limited toxicity in bees, but there’s still a chance this product could have unintended harmful effects on beneficial insect species if used outdoors.

You can use the Terro Ant Killer in your car, provided you don’t have children who may accidentally come into contact with the product.

It can also be used successfully in the bathroom and tub, as long as it’s not placed in areas where it will be washed away by water.

The product is unlikely to damage or stain surfaces around your house, but it’s always best to use the cardboard tiles provided, just in case. You should avoid letting the product come into direct contact with carpets or wooden surfaces.

How long do the effects of Terro Liquid Ant Killer last?

Terro Ant Killer is highly effective and can wipe out entire colonies of ants. This means the effects can potentially last for a long time, though you’ll need to start the process again if more ants move in. For this reason, it’s a good idea to combine the treatment with preventative pest control methods.

Once you’ve applied the product, you’ll probably need to freshen up your baits every couple of days. The product is only effective in liquid form, and if it hardens or dries out, you’ll need to apply fresh drops. You’ll also need to top up your baits if your ants eat up the initial batch.

This product isn’t weather-resistant, and spilling water on your baits will dilute the product or wash it away, rendering it ineffective. If your bait does get wet, you’ll need to set up new tiles.

How efficient is Terro Liquid Ant Killer?

Terro Liquid Ant Killer is a highly effective ant control product, and people usually see results within a few weeks of treatment.

When you first set out the baits, you’re likely to see an alarming wave of ant activity, but this will eventually die down.

You should continue using the product until you see a sharp decrease in the number of ants around your bait. When this happens, it means that most of the colony is dead – including the queen!

Expect to see a large number of ants when you first start using the product, as the sugary solution will attract ants from all over your house. It may seem like every ant in the neighborhood is dropping by, these are just the ants that have been hiding out nearby – remember, a single colony can contain hundreds of thousands of insects!

More tips for using Terro Liquid Ant Killer

Terro Liquid Ant Killer is really easy to clean away. Once you’re done with the treatment, simply dispose of the cardboard tiles in the trash.

If you accidentally spill some, just wipe it up with a cloth and, if it hardens, soak it with warm water using the method outlined above.

You can also maximize the effectiveness of the treatment by:

  1. Clearing away any other potential food sources: Crumbs, grease spots and other spills can attract ants away from your baits, making them less effective
  2. Not disturbing baits where ants are actively feeding: This can cause the ants to scatter, preventing them from carrying the bait back to the nest
  3. Not using baits in areas where you’ve previously used insecticides: Any lingering effects of the insecticides may repel ants from the area, making them less likely to take the bait you’ve laid out for them

Storage and disposal

Store the product in a cool, dry place, out of direct sunlight, and with the cap firmly fastened.

The bottle cannot be refilled so, when empty, throw it away in the trash or recycle it, if possible.


Looking for something to help you get rid of ants in your home? Then check out the Terro Liquid Ant Killer II. It's an easy to use, fast-acting, no-mess gel that will kill not only the ants you see crawling around but the whole ant colony, ensuring that your home is free of all the most common household ants for good! So why not try this simple solution to your ant problem?


Terro Liquid Ant Killer is ridiculously simple to use, and a highly effective way to rid your home of ants. Once you’ve set out your drops, ants will come crawling out from every hiding place in the vicinity to gather up the sweet, liquid bait and carry it back to their nests. The colony consumes the bait, the borax kills them, and, within a few short weeks, your home is completely ant-free.

The great advantage of this product (besides the ease-of-use and cost-effectiveness) is that it not only takes care of the ants you can see, but it also wipes out those in hiding. It’s also relatively harmless (compared to other insecticidal solutions), easy to clean up, and won’t harm surfaces in your home!

Frequently asked questions

Terro Liquid Ant Killer contains 5.4% Sodium Tetraborate Decahydrate (AKA borax) and 94.6% other, inactive ingredients.

Borax is thought to have low toxicity in bees. If you want to play it safe, don’t use the product in areas bees have access to.

Borax (the active ingredient in Terro Liquid Ant Killer) has low toxicity in humans and animals and is unlikely to cause skin irritation. However, it may be harmful if ingested or if it gets into the eyes. Therefore, Terro Liquid Ant Killer should always be used with caution, and placed well out of reach of children and pets.

Yes! Terro Liquid Ant killer contains sugar, which attracts ants. It also contains borax; an insect stomach poison that kills the ants when they eat the bait.

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