i've just dealt with this- i'm so sorry. bathe your kitty with a gentle shampoo (soapy water drowns the fleas so you don't need a flea shampoo- just a very thorough lather). dust everything with diatomaceous earth and let it sit for at least a couple hours if not a couple days then hoover, then steam. repeat. you can also try adding earth animal internal powder (recommended by martha stewart's holistic ver) to your cat's food. fleas don't like the taste of garlic (small quantities and powdered form so safe for cats) and the yeast so they will start looking elsewhere for a meal. also consider switching to raw/ very high quality canned food as fleas don't like healthy animals as much as those who's immune systems are compromised by poor nutrition. if these measures don't work, you may need to break down and bomb your home and do a single application of advantage but consult your vet first. the white collar is a great suggestion but hopefully these changes will alleviate the problem and it won't be necessary. good luck!