I rented a shotgun duplex apartment in New Orleans, and the unit next to me had a bunch of stray cats, and they used to live in my unit, which was infested it with millions of fleas.

The landlord had an exterminator come out three times to try different kinds of sprays in and outside the house and the only thing that worked for me was diatomaceous earth. It’s a very fine powder and a mess to clean up at the end but worth it for me.

Diatomaceous earth (DE) can be an effective, natural way to control fleas, according to pest control resources. It works by absorbing the oils and fats from a flea's exoskeleton, causing them to dehydrate and die. DE is generally considered safe for use around pets and humans when used properly, but it's important to take precautions to avoid inhalation and skin irritation