this just happened yesterday... there's severe winter weather hitting chicago right now, frost all over the car, bits of snow around the rear glass window, etc.

so last nite, i start the car, and there's random scratching/crackling type of noise coming from the rear ragtop area. i was hoping it was related to the defroster being on, or the heater being on full blast, but it's not. nothing has changed on the car, just the weather's gotten WACK. +1 deg windchill this morning... ugh..