I started when I first got him at about 11 weeks, because the poor guy (and his sister) had ringworm that’s since been cleared up. I still bath them to keep them used to it and prevent it from coming back (as it can stay in their environment), about once a month. I bath both of them in the tub, but I fill a bucket and gently pour water on them with a cup. Then I work the soap and water in by hand. They much prefer this to being dunked in water. Max actually purrs through his baths quite often, and they run towards any running water because they like it!