Fall out is a PH neutral bleeding wheel cleaner, so called due to the nature of the product changing colour when it is activated on wheel/body of the vehicle. Directions of use: Spray on and let the product change colour as it dissolves all the contaminants effectively bleeding as it turns purple. Simply wash off with a power washer. Although designed as a non-contact wheel cleaner, more stubborn dirt may require a little agitation. Fall out is a PH neutral bleeding wheel cleaner, so called due to the nature of the product changing colour when it is activated on wheel/body of the vehicle.Directions of use:Spray on and let the product change colour as it dissolves all the contaminants effectively bleeding as it turns purple.Simply wash off with a power washer.Although designed as a non-contact wheel cleaner, more stubborn dirt may require a little agitation.