I have noticed that when I clean my truck, I have some braking issues. When I spray the rims off, or when there has been alot of rain or snow, and my truck has been sitting in that type of weather for a day or more, I have some braking issues. The first couple of times of hitting the brake, the brake pedal will go down to the floor, but my truck keeps going. When I push the pedal all the way to the floor, then the whole truck starts vibrating and then finally the the truck stops. After this point, then I don't have any braking problems. Has anyone run into this problem. Is there anything that I can do so this will stop happening?