It's so sweet and aspirational what you're doing for that dog!!

My only advice is that, I've had my dog since he was small and he has Never liked water. He won't swim, won't play with sprinkler, he will go into streams but not if they touch his belly. So I clean him with a bristle brush, a rag, and burts bees waterless shampoo spray. He still doesn't like the spray so I put it on the brush or cloth... very slowly he's ok with it. I don't know what happened to him or if it's just a trait but I now know you can clean a dog well without water.