If you ever need to get rid of fleas, or flea eggs, but want to keep it simple and less gross than fogs and such.
Get a box of Borax, sprinkle (roughly one to two cups onto a 10′ x 10′ area) on all things fabric. Don’t forget to get the corners and under beds/sofas. I would recommend it sit for at least 24 hours, but if you got a bad case or are a crazy cat lady, give it a few extra days. Don’t let you kids lick it up or anything.
Vacuum up, and empty the container right after you finish.
Why does it work?
I don’t know exactly, but from my chemistry studies, boric acid dries up the outer shell on the fleas and eggs so they cannot live. The Borax will also make your carpet clean too.