As a reader with pets, I was interested in your August/September 2002 article on flea control and surprised it didn’t include the best remedy I’ve ever encountered: borax.
Sprinkling borax onto clean, well-vacuumed carpet, bedding, chairs and sofas works perfectly, although not immediately. In about six weeks, the fleas disappear from the house. This method interrupts their life cycle at the larvae stage, and this is why it takes time to be effective. One good treatment lasts at least a year.
Borax (sold in the laundry-soap section in supermarkets) is a fine, white powder. After pushing it through a strainer to get out the lumps, broadcast it by hand, a yard or so above the floor/chair level. If the carpet is a dark color, a light sweeping sends the little grains into the nap, where they disappear from view.
Because it’s inexpensive and effective (after six weeks), the borax flea-control method may be the best flea control of all.
Mercer Island, Washington
Borax is relatively nontoxic to humans, but we would not recommend letting young children play on the treated carpets. Also, do not apply borax or other boron-containing products to the soil; excess boron will permanently damage your soil.– MOTHER