I'm sorry to hear this. I know how hard it is to bathe a cat. Why does he need baths 3 times a week for the next few months?

When Starr had ringworm and the vet suggested that I bathe the others, I just put the special shampoo and water mixture in a squirt bottle and I put them in my shower and sprayed them down. I then lathered them up and I got a bowl of water with a cup and I gradually rinsed them off with this. Luckily I only had to do this once. Since he's so grumpy, I'd also suggest that you put on a suit of armor before you start. Good luck.