Spray Caramba engine and cold cleaner, allow it to soak and hose off the surface with a rather strong water jet, e.g. a high-pressure cleaner. Repeat the process in case of very stubborn contamination if necessary.
Attention: Do not spray Caramba engine and cold cleaner on hot parts! Cold cleaners may be used only in conjunction with a light-liquid separator (petrol separator). To prevent burdening the waste water systems they may also not enter into light-liquid separators together with emulsifying tenside-containing waste water.