Sam didn't actively push him away, so what he was doing must be okay. So Jarvis continues, making sure to actively get every bit of flesh that he sees. You might have to stop him when that sponge comes near the face. The shoulders, arms, hands, back and chest are done, along with his neck and even behind the ears.

If anything, Jarvis is very thorough.

"I suppose now I understand. When I was in the computer, I didn't understand how such a thing could put such fear into you. I'm sorry for pushing at it so much, Sam."