

We sprinkle a line of food-grade diatomaceous earth outside right next to each of our doors, so the outside ants would have to cross it to get inside.
We also got a plate that’s larger than our pet’s food bowl. We put diatomaceous earth on the plate and then put the pet bowl on top of that.
Finally we put out a borax-sugar solution. I drilled some ant-sized holes in the side of several plastic containers that have tight lids (we have an indoor bunny and I didn’t want her getting into the borax even though it shouldn’t be enough to affect her). I soak cotton balls in the borax solution, put them in the plastic containers, and place the containers along any ant trails I notice.
Borax solution: 1 cup warm water, 5 Tbsp + 1 tsp white/caster sugar, 1 Tbsp borax. Mix until dissolved.
Same as i_stole_ur_taco. The brand I buy is “20 Mule Team” and it’s advertised as a detergent booster. The only ingredient is sodium tetraborate.