We're talking liquid bait again today, with a question we usually hear from loyal TERRO® users, who have been buying our products for years.
Question #3 - What is the shelf life of the Liquid Ant Killer? I've had this bottle for several seasons.
The liquid ant bait, whether in our dropper bottle or pre-filled bait stations, does not have an expiration date. The effectiveness of the active ingredient, Borax, does not diminish over time.
You may notice the liquid changing color to yellow or brown, or the liquid thickening a bit. These are both caused by a slow crystallization of the sugar, which is a main ingredient in the liquid bait. As long as the bait remains in a liquid state and is easy to pour, it will still work to attract ants.
However, we recommend using fresh bait if you've had the same liquid bait for more than two years.