We dont have a bathtub, so i had no chance but to get in the shower aswell, so that he doesnt run off. I used Ultra sensitive/perfumeless soap and I had to scrubb it off with my bare hands and a running shower. We live in a rural area in Germany and he apparently likes roaming around next to cows. He really hated being washed and was making very sad meows for the most part, and it took at least 10mins of non stop scrubbing and showering for him to get clean.