Possible Winter Shutdown?

Hey all over the last 6 or so weeks my male ball has been acting strange I was curious if this was winter shutdown.

Symptoms:
Refusing meals for 6 weeks
not hiding in hide
not roaming cage at night
stays in back corner of the cool side most of day and nite

Cage Conditions:
20L with aspen
2 hides one on each side (cool/hot)
Hot side temp 92ish
Cool side 80ish

Zues still looks healthy but he's startin to worry me because of innactivity

anything helps!!!

what's the humidity? floyd shut down once... it was winter so the furnace was on and drying up the air... got a humidifier by him and he snapped out of it!

I try to keep it around 50-60%

How are you measuring the temps/humidity, just out of curiosity? Sometimes people end up with the analog hygrometers/thermometers--and those tend toward being inaccurate. But if you're using digital, then your temps and humidity sound right on. Have you changed his enclosure at all in the last month or two? New hides/substrate, new food source?