Peppermint oil! We get ants EVERY year-and every year the stupid terminex people come out, they go away for a week and are back in full force. So much for chemicals....So last year out of desperation and an attempt to avoid bombing the whole house, my dh bought some peppermint oil and used it around all the areas where they were and were coming in. He also made a baking soda/peppermint leaf powder for behind the freezer where they were concentrated. They were gone within a few days and never came back.
We also planted peppermint plants all along the front of the house (where they were coming in) and over the year, its grown A LOT. We havent had any sign of them this year.
Also, on a side note, I use Mrs Meyers lavender stuff in pretty much my entire house and I have read from 2 other users that they had ants and they went away after switching to this....I dont know if it has peppermint too or if they dont like lavender or what, but hey, I love it anyway so if it helps-bonus!
