If you wish to keep your windows intact and prevent cracking or breakage, it is essential to use cleaning products developed for motorhome acrylic windows. Try to park your vehicle in shade to protect it from exposure to heat. Don't use methylated spirit as it can cause the cracking of windows. For more details visit: https://issuu.com/caravanparts/docs/ppt_-_caravan_windows_-_aug_2022.pptx