You can treat an infestation of fleas easily by using household items, the most common of which is salt. Sprinkle salt on every carpet in your home, let it sit and then vacuum it later. The salt causes dehydration in the fleas and their larvae.
A cup of baking soda mixed with a cup of salt will kill fleas. Sprinkle the mixture on your carpets, work it into the carpet and let it sit overnight. The next morning vacuum and through the vacuum bag away.
Salt is the common household item known to kill fleas. Salt when placed on surfaces where fleas possibly lie can dehydrate and kill them. Vacuuming the area afterwards is recommended in order to totally eliminate fleas.