Around a month and a half ago I picked up a 5 year old male Jampea Dwarf Retic. He was eating and acting fine for a few weeks, and then two or three weeks ago out of the blue he started to rub the right side of his face all over his enclosure. He's being housed in a 4'x2.5'x2' wooden enclosure w/ sliding glass doors, heated with a heat lamp. He has the largest Reptile Basics I could find (which he often uses) and has newspaper as substrate. I've checked his face quite closely and didn't find any stuck shed or something that would otherwise cause discomfort, and he has no symptoms of an RI. He's still eating like a champ and has shed since he's started the rubbing. Any advice on what might be the issue would be greatly appreciated, thanks.