we put warm water in the big salad bowls and put left him in there for a few minutes. He never fight back to come out. He just put his chin on the edge and rest. We have to take him out of the water. It could be the freak of nature. His enclosure is plastic tub and we use news papers. Humidity is between 55%-65%. We had him since August of 2011 and haven't miss a weekly meal yet.
The only reason we put him in water is we let him roam on our bed. We just want him to be free of Rodent smell and free of pee or poop. For eight months, we have not seen any aggression or any refusal of a meal. That is the reason we assume that it is ok with this process.
Then again, I can be very wrong. I will take pics or video of the process and can you see that he is stress or not. I just don't want to harm my sweet boy.