2003 Pontiac Grand AM wipers, windshield & visibility problems

I rented a 2003 pontiac grand am on feb. 04, 2003. It was very cold, at night, and snowing heavily. I turned on the rear defogger. It failed to clear the rear window, and I turned it on again after noticing that it had turned off. About 30 seconds later the rear window exploded; there was no projectile found. My wife, who was with me when it happened, and I believe it has to be a factory defect, and we should not be held responsible, yet we are being charged by budget, who was charged by the dealer, for the repair.

Bought 2003 pontiac grand am gt new in march 2003. Moonroof and driver window leaked water frequently, while power windows "clunked" when going down. Took to dealer 3 times for these problems in 2005-2006 while covered under warranty; only moonroof was repaired, dealer claimed nothing was wrong with windows. Windows continued to roll down slowly, making loud noises when going down, and hesitating when going up.