If you have fleas in your home, vacuum (at least once a week) all the areas where your pet hangs out. Then sprinkle common table salt in all of those same places, and after 48 hours, vacuum again. Repeat the procedure—sprinkle salt, and 48 hours later, vacuum. Hopefully by then, the vacuum will have sucked up all the original fleas and those that hatched during the four-day salting.