hey y'all, i have a question about humidity:

my bf and i got our snake last week and he was a bit dehydrated because the breeder sent it to us during a shed. for our snake we have a halogen "day" lamp...it provides heat but its mostly for the light because the room he is in is somewhat dark. Next to the day lamp is a heat lamp ...for heat and then we also have a heat pad to keep the setup warm enough. the tank is a 10g aquarium with a wire top. our main problem is keeping the humidity up. Because he is more dehydrated than he should be, we try to keep the humidity between 50 and 60%, which means we're misting the cage 3 to 4 times a day. at the top of the tank, between the two lights we have a piece of aluminum foil to try to keep in the humidity. we have also tried to keep a pice of saran wrap, but it did not stick.

Is there anything that we could do to keep the humidity in and at a more or less constant %???

thanks