Title says it all, ever since I added an RHP to keep the ambient temp up the humidity gets too low. I am using corrugated wrap as a substrate, have a pretty large water bowl that I put on the hot side to try to get some water to evaporate into the air. Short of the covering the air vents on the hot side of the cage (which is probably bad) I'm not sure what to do.

I would like to avoid setting up a fogger on a timer, but that's really all I can think of. A humid hide wouldn't work well on cardboard.

Any ideas?