We had a really bad ant problem too. I found this online and decided to try it out. It's been a week and there hasn't been a single ant in the food dishes and we've only found a few here and there in the house, mostly downstairs and NONE in the kitchen where the mixture was. :) I placed one cap full under the stove, one under the microwave, one in a cupboard, and one on the counter in a spot the cat couldn't get to. Make sure the gliders are kept away from it, mine don't have free run of the house so I only had to worry about the cat.
Supplies Needed
1/2 cup of sugar
1 1/2 tablespoons Borax
1 1/2 cups warm water
Cotton balls or paper towel
Instructions
1. Mix the Borax and sugar together until well combined.
2. Add the mixture to your warm water and mix constantly until the powder has been completely dissolved.
3. Seal the mixture in a jar or container for future use, and use only what you need in the next steps (and save the rest). It is important that you clearly label the jar, as it will just look like water. Do not leave this where children can get to it. (Because this is such an easy solution to make, however, I only kept what I made until after the ants had been gone for a week or more.)
4. Fill some jar lids, milk caps, or other shallow containers with cotton balls or a wad of paper towel.
5. Add the sugar-Borax solution to the prepared lids making sure to soak the cotton balls (or paper towel).
6. Wait. It may take the ants a while to find the solution. But, once they do, let them feast (and take the solution back to their home). At our house, to speed up the finding process, I placed a couple of the soaked cotton balls directly on the ledge in my kitchen where most of the ants were.
Be prepared – more ants will probably show up once they find the solution. However, within a day, you’ll probably see much fewer ants. Over the course of just a few days, all of the ants should likely be gone. Because we had watched the ants quite a bit, we noticed where they were coming from and made sure to use a sealant to seal the area to stop them from coming back in the future.