[croddy]

Was the car running during or just before you washed it? I think if the mirrors were hot and you put cold water on them they could crack. I also dispute the above statement that cold to hot is not possible. I had an older car that I let warm up for a while on a very cold day. I neglected to turn on the heater or defroster when I started the car, so when I got in it the window still had frost on it and the car (except for the engine)was cold. I turned on the defroster and CRACK! the window cracked right at the line where the defroster air vent was. I hope Lexus takes care of it for you!