I take showers and baths with the bag on. Afterwards, I towel dry what I can and let the rest air dry.
if I going to change the appliance, I take it off and shower naked. Any spewing just washes down the drain. I try to let my skin breathe 15-30 minutes as I don’t like having adhesive cover my skin 24/7. I just sit on a towel on my bed with paper towels, a bowl of water and a garbage bag in case he spews.
Do what feels best to you. There’s no right or wrong!