Why cant i get rid of their fleas!!!! ANNOYING?

Well, fleas are also in the carpets and fabrics usually. For now, look into getting one of the monthly treatments that you put between the cat's shoulders. I've used Frontline Plus with very good results. It is safe for your cats and does work. Shampoo kills fleas, but it really isn't the best from my own experience. I have also used a spray on treatment for my cats with decent results. The best I've really found is using frontline.