HALLELUJAH. I've been telling people on here for months not to use it as, as you say, fleas are now immune to it. Really sorry you've had to find out the hard and expensive way hammerman. You'll need to get a spray from your VET, of say Genetrix which is expensive but works to get rid of the fleas in your home. You will have to spray it everywhere, a few times, over 2/3 weeks before you can be sure you have god rid of them all plus their eggs. For your dog you need Advocate from your vet which is excellent. It's going to be a nightmare for a while I'm afraid, I know, it happened to me and my neighbour. Just google FL being ineffective and you will see the truth. X