I agree with the suggestions to sprinkle Borax on the rugs. It is a close relative to boric acid, which is deadly to insects, but about as toxic to humans as aspirin. Keep in mindthough, that if you have babies crawling on your rugs, this would not be a good idea. Pets will also get this on their feet and lick it off.
Common sense will go a long way toward keeping everyone in the house safe. I would suggest using boric acid instead of Borax, which is available online at guardianofeden.com. I bought 6lb for about $25 which included shipping. Their packaging goes up to 50lb. Wearing a particle respirator when spreading the stuff on your carpet and when vacuuming is a must. Use high filtration vacuum bags, and discard immediately while still wearing the respirator. It is possible to poison oneself and loved ones with this stuff, so use some common sense. Good luck! ... View related article.