To successfully treat a flea infestation, you need to treat pets and their environment at the same time. That includes indoor and outdoor areas, bedding, kennels and anywhere the pet likes to sit or play.
Fleas have 4 stages in their life cycle:
An adult female flea can feed on an animal’s blood, then mate and lay eggs within one day of hatching. Each female can lay up to 500 eggs over her lifetime of several weeks.
If you have fish or reptile tanks, cover the tanks and temporarily turn off filters until after the treatment has dried.
Then be patient. Eggs will continue to hatch and die over the next five or six weeks (with normal household activity).
Do not leave flea infested areas undisturbed. In fact keeping your pet in the areas that have been treated will ensure the fleas are attracted to those spaces. Movement hatches fleas and only once they hatch can they come into contact with the chemical treatment and die.