If you don’t have a pressure washer, then you’ll need a mop and bucket. The most important thing is that you remove the oil, grease and grime or your driveway will never look clean. Depending on the severity of the stains you’ll want to let the sawdust soak for 12 to 24 hours. Once it has soaked you will want to sweep off all the sawdust. Then xix up a washing-soda solution, pour it over the driveway and scrub with a brush to remove leftover dirt and stains. Alternatively, sprinkle detergent on the driveway and scrub with a brush. Rinse your driveway thoroughly before it dries after cleaning.