Ants do not like mint.
1 cup water, 1/2 cup sugar and 2 Tbsp borax. Ants love it and take it back and within a few days they are gone. Not safe for dogs or kids. We put it out at nite and take it up during the day and it still works amazing.
Sprinkle your old coffee grinds on the hills. They don't like them and vacate!