what dry skin on hamsters ears

[weaverfam02]

My Syrian hamster has white dry crusty ears. I rubbed a white towel over his body to see if any black spots appear and there wasn't any. a use a warm wash clothe and cleaned his ears and body. I use a Q-tip with peroxide on it to also clean them out just in case. I put coconut oil on his ears afterwards. After all this his ears perked back up and look healthier again. for a few days it didn't look to bad just looked a little dry so I would wipe them and put vaseline on them. but last night they were more dry and crusty looking and he held them down, so that's why I did a better cleaning. Can this be part of getting older? I didn't see any black things in his ears or on his body, it's just white crustiness.