When I change the bedding (Forest Floor Cypress) the humidity in my tank jumps to about 70 for a minimum of 2 days (because this stuff holds a lot of moisture). I'm already using as less as I can. The tank normally sits at 55-60 when the bedding drys out more. One more question, what if for some reason my lamp goes off since the heat from it drys out the humidity and the humidity shoots to like 90?