Comfortis Flea Pill and Bathing?

Anyone know much about this newish flea pill? I'm having a problem with my dog and fleas. She has a very wiry coat and the topicals just don't work like they should on her. In less than a month I'd used both Frontline and Advantage and she still had/s fleas. I gave my dog a bath 2 and a half days before I put on the Frontline (I think the recommended waiting period is two days), but it just didn't do anything, she still had fleas. I was pretty disappointed as this stuff always worked great on my normal-haired dog. So I gave her a flea bath (vet said this would of course kill the fleas but also completely strip away the Frontline), and waited a week and tried Advantage. This worked GREAT, no fleas. I sprayed around my house and vacuumed like crazy, treated my yard, the whole nine yards and thought I'd won the war (I know, silly of me really). After a couple weeks though my dog was getting awfully stinky, and what good is having a flea free dog if you can't stand to be around her right, so I gave her a bath, this time with a more gentle shampoo I hoped wouldn't wash away the flea treatment, but it did, and she somehow has fleas again, so now I'm back to square one. My dog is just an especially stinky girl, I just can't go more than a couple weeks without giving her a bath. So, I've been looking on the internet and found this flea pill and what I want to know is if I use this, since it's taken orally and not applied to the skin, would it then be not affected by bathing? I can't find any answers online and neither of the vets in town carry this so I guess I'd have to buy it online. Anyone used it?