Why do some wheel cleaners say to spray on dry wheels and others say to spray on pre-rinsed wheels?
It is always safer to apply or spray chemicals on a cooler wheel. It is NEVER recommended to apply or spray chemicals on a HOT, dry wheel! If a wheel is hot then it would be a recommended procedure to hose the hot wheel down with cool water before applying most wheel cleaner products. Product labels that say to apply “only to cool, dry wheels” are potentially reactive with metal, and are therefore potentially unsafe on certain types of wheels.
