Vacuuming a lot can also help. When vacuuming, you can pick up tons of fleas and eggs. If you vacuum it is smart to put something to kill off adult fleas. If you do not, the fleas will escape and your efforts will have been all for nothing. You can try cutting a piece of a dog flea collar and placing it in the vacuum. You may also try moth crystals and other things poisonous to dog fleas that will kill those that get sucked up in the vacuum.