He does go out on the screened lanai. I just noticed him scratching, and checked him and saw a flea. Like a dummy, I treated him with Zodiac spot on, but I only used half the amount on Saturday, because I was worried about his reaction. I gave him the rest of it on Tuesday. I had second thoughts and washed it off him, (I read some stories on the internet!) Well, he still has some fleas, so today I gave him a nice bath with gentle detergent. He was such a good boy, and now the remaining fleas are dropping off, and I am combing him with a flea comb (he’s purring) he must know I’m trying to help. I would like to put Advantage on him and wonder if that would be OK. I plan to call the vet in the morning, but am hoping for some advice from other cat owners. We have been treating the condo with flea spray, but keeping him out of those rooms while they are being treated. Any advice would be greatly appreciated. Thank you