If you have carpeting, you need to treat that as well, the heat your sweeper makes will cause eggs to hatch...i found for carpet treatment, use simple iodized salt mixed with borax and sprinkle it on the carpet. Use a broom to work it deep and leave it on for 24-48 hours then run your sweeper. The salt dries their bodies out and the borax kills the eggs. I didnt believe it untill i was at the end of my ropes in Maryland. No matter what i used, frontline, capstar, sprays in the yard, sprays on the carpet, flea bombs ..you name it.. i used it. We lived on Sands Road if that tells you anything. We had something they called sand fleas which are in my opinon much more annoying and persistant than your typical fleas. When you use your sweeper, empty it or remove the bag right away and dispose of it outside. Even pour some flea powder or borax and salt in the cup/bag before using to kill them while you clean. But ALWAYS empty and dispose of contents right away, they can literally climb out of your sweeper!!!! arghhhhhhhhhh I hate fleas! Good luck!