To generalize a bit, lizards need to be fed more often. Also, when/if you feed insects, they need to be dusted with the appropriate supplements.

Btw, crested geckos lick their eyes to keep them moist.
My crested geckos are so much more work than my snakes and T's. I'm tempted to sell off most of them (it does not help that ball pythons trying to steal me back). I think once I can get them into consolidated caging and some bioactive setups it'll be a bit easier...hard to say.