I've been battling them, too. I think my pup got them at the vet's office. She's on her second month of Frontline & has had one Capstar pill that kills all of the adult fleas on her for 24 hours. I think that gave her the boost she needed as she's been soooo much better since that.
Basically vacuum the heck out of everything, wash his beds, any clothes, collars, harnesses & stay on the Frontline or something similar that your vet can recommend. I've heard both that it can take 3 months & 6 months of treatment before your home is free of them.
As for the groomer I think it's pretty much out of her control, though I understand your frustration.
Also you should wait at least 2 days following his bath to apply the meds then at least 2 more days before you bathe him again. I did the 2 day thing last month with no results, so waited 4 days this time. Not sure if that has anything to do with our growing success now.
Good luck, it looks like those little devils are reeking havoc in a lot of homes this year.
