Poo clean-up: water with a drop of Ivory (mild) soap
Not sure what you mean about his scales "catching"? Got pics of scales? Sounds like his climbing has just damaged (bent) them? They should not "come off".
Not very typical for a BP to climb this much...makes me wonder why? Like, is his cage too hot? Need more info, how you are keeping him???
Would letting go across a damp towel also do the trick for the dry poo?