The hygrometer reading 99% isn't a problem. Check the substrate... is it soggy or just a little moist? Soggy or pools is bad, a little moist is fine. It's fine to leave the water on the glass sides, actually it's better if you do. The water will evaporate off the glass and keep the enclosure humid and since the snake doesn't sit on the walls all day it doesn't pose any risk to have the water pooled there. Just make sure it isn't pooled on the bottom where the snake is.

It's almost always 5 days after the cloudy eyes that they shed. Good luck!