If you want a totally enviro friendly way..... and yes i will sound like a nutter but I have seen it done and stuffed if i know how but it bloody worked...... you could ask them to leave.

yes i said ask them to leave. Have a weirdo hippy mate total pagan greeny and she found some ceremony crap in some wiccan book and mixed some oils n shit and burnt them in a burner and called the spirits or some rubbish and then asked the ants to leave. If I hadnt seen how big her ant problem was to start and the effect a week later I would never have believed it! She asked them to leave and they did.

I still tell her shes a freak but what ever works for her lol

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Foxy

Not speeding Officer........Qualifying.