I hate ants. I was lucky that I never have any ants problem here until this summer. May be because now I have a toddler around and with kids you know, they attract ants too. Another thing is I have less time to clean up properly and also maintain the kitchen well enough.
Ants are a problem in my house now. Once they come, they will return no matter how we tried to keep them out. They have the strongest antenna and scent that can find something we wouldn't know that will attract them at the first place.
Whenever there are ants, I use the vacuum cleaner. I tried to follow the trail but I can't go through walls. I don't use insect spray as much because I have a little boy at home. I tried my best to keep the stuff that has history of ant attraction like this so no ants can find them. Yup, a plate with water with all the items in the center. Very tall indeed.