Mine pretty much balks at the tub too but sometimes during the "dry heat" of winter with the furnace heat turned on his sheds can be awful. I personally use an super huge plastic tub with lid that I use as a snake "pool". After the initial "shock" he settles down into the tepid water and soaks for about 20-30 minutes with just his head above water. Then I dump the water from the tub and add a nice warm, damp towel that he uses to get rid of his unshed skin. He comes out nice and clean and gorgeous in his new skin!
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Ken Roshak
BlackSwampSerpents@toast.net