I was told by a member on here to put tin foil or plexi over part of the top if its a screen top and place a damp towel over that.. but it can get mold so check it daily too.. someone also added to spray the tank daily with a mist bottle....
I used the tinfoil and spagum moss ( buy it from home depot or lowes pet stores charge too much) what I did was put it in a tub-a-ware container and drill holes in the cantainer and soak the moss with water, pour out most the water and place the top on it and put it in the tank by the light, it will help with humidity and that will help with his/her shed.. I'm no pro but its what I did and it's workin well thus far.. Good luck
Cheers