Hi, Can someone please let me know if there is an element of risk in RAISING the roof when it is bitterly cold? I know you can heat the rear window before LOWERING the roof to avoid the rear window cracking. However, after the window in stored away while driving it can become bitterly cold outside. So, will the window maintain heat, or actually get somewhat warmer when stowed, or will it get even colder in the stowed position? I cannot look at the window or judge the temp while it is stowed! I really don't want to crack the window when raising it back up after a wonderful winter's drive! Thanks.