We have the same problem here. It takes diligence to keep them at bay & like you we hate to kill ANY living things. HOWEVER, there comes a point...
That said, as soon as we got our 1st few warm days of spring the little buggers made their 2009 debut, & since this is the 3rd year we've had to deal with them, I am to that said Point & wanted to get a good jump on the situation before it got worse. I looked into professional help but quickly & easily decided against it as it's 1. costly 2. they have to come back *monthly* to re-spray 3. their products are very harsh (& dangerous to some pets...birds & ferrets, especially, which we have) 4. their methods are invasive 5. our water supply comes from a well, which I would be very worried about contaminating. SOOOO, I resorted to using Raid Ant KILLER (mua, ah, ah

), & it has worked GREAT so far. I use 'outdoor' around my doors & 'indoor' (which has a somewhat more 'pleasant' scent) inside, & only spray in the small area they seem to like (thankfully they've kept to that same area each year). I started by spraying each day for about 3-4 days straight then cut back to once every 2-3 days. I'm down to about once a week, & that's just to KEEP them away as we've not seen any inside since we started this, & the days are pretty consistently warm now.
I realize those sprays may not be an option for you, ionns, if only for the simple fact that you have a little one running around. I certainly wouldn't use this product if my son was still so young. And because I'd generally rather not rely on harsh chemicals, like Raid, as our permanent solution I did a little more research on some natural ones & I came across this web page with a plethora of suggestions (that may or may not work):
http://www.thefrugallife.com/ants.htmlhttp://www.thefrugallife.com/ants1.htmlThere's also the option of an 'Ultrasonic Waves' device (which I plan to buy). They plug right into an outlet & there are many brands & price ranges. But note that these devices can also effect your pets by the sound they make (which people can't hear). Some pets cannot tolerate it. Here are a couple of pages with info:
http://www.safehomeproducts.com/shp2/es ... swers.aspxhttp://www.epinions.com/content_1818796164Hope everyone finds a solution! Ants can be SUCH a pest
