Hi,
They clear up a couple of days before they shed so keep on top of the humidity.
But check inside his hides and in the aspen just in case he shed and hid it.
You will probably find you would have a lot less trouble with humidity if you moved to an under tank heater on a thermostat instead of all those lamps.
Have a look around at other peoples setups to get an idea of what can be done.
dr del