If not to dirty i would compress it of then give it a very good squirt of GT85 leave to soak for 5 mins then re compress it of be careful not to get the GT85 on brake discs as causes less performance when you come to brake;
If really muddy i will bring home take engine and radio tray out spray with muck off or PSR car cleaner leave to soak for a while then put a towel in bottom of the shower cubicle and shower away.Take out then again a good covering with GT85
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