Answer to question Number 1….you might try misting with room temperature water 3 times per day. That should perk the moss up if it is suffering. Reduce the misting to twice per day in about a week. That should solve the problem. If it doesn’t, you may need to purchase an automatic mister. For question number 2, please supply a bit more information. When did the problem first start (how long has this change been taking place)? When did your gecko molt last? Is there any way you can post a good picture, so that the nature of the skin color, texture, and so forth can be seen, at least somewhat (pictures are not as good as face to face, but better than a description alone.)