I think it's great that you cleaned your mice. Years and years ago when I was a little kid, I had a baby squirrel that was left abandoned in my yard. Me being me at the time, I fed him a chocolate cherry and it got all over him... I had to give him a bath and it seemed like he enjoyed it. I am sure bathing mice is not a problem! Animals go in water, I don't see why a mouse would be any different