Imperfections in glass (all windows) which cause visibility problems in the daytime and nighttime driving. i have reported this to toyota customer service center. a toyota inspector has inspected the glass and toyota refuses to correct this problem. i have had several glass company's and auto detailers look at the glass and they have told me that it is a factory defect.
The windshield is cracking without the temperatures being so high. the vehicle was parked but turned on, when we turned on the heat and drove it for a little bit (6 miles) we noticed the windshield cracking and we turned off the heat. temperature was at 40 degrees the lowest.