Sidewalk chalk is cheerful and fun, but there are certain times that you might want to clean it from your driveway, sidewalks and paths to make a good impression. Follow these steps to clean up quickly and effectively. If you can reach the chalk areas with a garden hose, spray it down thoroughly. If not, fill a bucket with water and douse the area. Brush the chalk areas vigorously with the stiff bristle brush. When finished, re-rinse with a hose or bucket of water. If needed, use the liquid detergent and sponge to finish cleaning up the remaining chalk. If the chalk still seems hard to remove, switch back to the brush. Rinse away all of the suds and chalky water with a hose or bucket and allow to air dry.