[QuickSilver]

Vacuum, vacuum, vacuum, vacuum. This stimulates the flea eggs and hatches them, so you can kill them all at once, rather than getting recurring infestations.

Also, I've been told that small dogs tend to be allergic to flea bites, so that may be why he is still scratching so much.

BTW -- isn't it creepy to find something living on your dog??? I've found one flea on Thor, but yeah, narsty. We used to get infestations all the time when I was a kid b/c our pets were indoor/outdoor. I will never put my family thru that. :P