I have two dogs, and recently, for whatever reason, they've both come down with fleas. So I sprayed them with flea spray, sprayed and washed (or hoovered) all the places they go, (sofa, their beds, etc.) and gave them flea collars.

But the stupid things just won't die! I keep buying spray, keep spraying all over the house, I've used flea powder, etc. but the dogs still have fleas and they still keep jumping onto us, and are still in the places the dogs go.

Does anyone know what I can do to finally kill every single one of them?!