If ur car is black, like mine, IT SUX! The water does not dry at they say it does. For just about NE other color, it's OK.
i have a black car and it works great
you jsut have to be meticlues
rinse the car soap it sponge hole car rinse then do the auto dry about 5 inches from surface going slow ...
ive never had proplems hotter days you have to keep wetting it so the soap does try but ive done it in direct light on 95 degree days