What a cutey. Are you sure he's a him? Do you know how old? As far as giving him a bath use lukewarm water and do not use soap. I use a very soft bristled brush to lightly brush off any dirt or feces they have stuck to them. Make sure to dry them completely after the bath. If you can't be sure he will bask under his lamp afterwards I would probably hold off on giving him a bath. (damp tails can lead to tailrot). Make sure to give him time to relax in his new home as well. Good luck with your little guy, he looks great!