Looking scaley? When they're about to shed, they turn dull in color, and their eyes look blue and opaque. They often don't eat while shedding, but this process only takes a week normally.

You say you're 'pretty sure' your temps and humidity are correct.. how do you know? Do you have a digital thermometer/hygrometer in your snake's enclosure? If you don't, you can pick one up inexpensively at target or walmart.. a good brand is Accu-rite. It's an indoor/outdoor thermometer/hygrometer.

Remember.. temps on warm side should be 90-92, and cool side 80-82.. humidity 50-60%.