Humidity

I was just wondering how long after their eyes turn blueish gray will they start to shed. I have their humidity at 60 percent and put a wet paper towel in their hide boxes. The rack I have built for them has the hole board tops, should I try to cover half of it for even more humidity. I don't have holes on the sides of the tubs.

They'll usually shed within a week of being blue (some a lot faster, depends on the snake). It's first their blue stage, then they clear up like normal, then they shed. If you have a damp water towel in there I think he'll shed fine.