bad sheds

I have a problem i have a 40 gallon tank with a screen top and ceramic heat emiter.Also an UTH. I have a humid hide. But i my bp will never go in it. Whenever he is ready to shed i put plastic rap over half the top of the screen. But he still doesn't have a good shed. Eventually it all comes off but it would be nice for him to shed it all at once. So what should i do to keep the humdity up if i have to im going to put him in a rubbermaid wich i used to keep him in and isnt to small.

first of all, you need a thermometer/hygrometer which you can get pretty cheap at walmart. then measure to see what the himudity is.(it is supposed to be between 50-60%). then if it is low, put the saran wrap over part of the top and leave it their, as long as you dont cover more then about 2/3. you can leave that on all the time. thats what i do. see how that works.