How do I kill flea EGGS specifically in my home?

Why am I still seeing "flea dirt" on my cat almost 2 months after starting treatment with Advantage?

• I read that Advantage kills fleas before they bite so they can't lay eggs and therefore breaking the flea life cycle but if they are supposed to be being killed before they bite then WHY am I still seeing specs of flea dirt throughout my cat's fur?! Flea dirt can only be there if in fact the fleas are biting and pooping the nasty specs out. I have had an exterminator come out to treat my apt. almost 2 weeks ago and have been vacuuming every day or every other. I initially washed all bedding after the exterminator sprayed everything and try to wash bedding often. I do not allow the cat to lay on my bed or my sons. However, he loves to sleep on our couch. I vacuum our couches almost everyday and find at least or two of them crawling. If my cat gets up from napping on the couch, there almost always is a flea or two left behind. I don't know why I'm seeing them so easily now. I just don't understand how Advantage flea medicine works. I realize it is going to take some time before my home is flea free but I feel like if the fleas are biting my cat and laying flea dirt then they must be laying eggs too. I thought the flea would die right after biting my cat or just contacting my cat's skin but if I'm seeing flea dirt this can't be true. They're obviously living long enough to poop out the nasty specs! Anyone know something I don't? Any advice would be appreciated!

• Answer:

  Advantage treatment only lasts for a month. It is something you need to apply for a couple of months before you completely get rid of the fleas. I find flea combs help to get rid of some fleas, you can try buying a flea comb (normally available at the dollar store) and brush your cat out everyday or so. You can also bring your cat to the vet where they could give them a flea bath or give you a different brand of flea treatment. I like Revolution also, if you want to try that.