Sweep or blow away loose dirt and debris
Rinse the concrete with water
Apply a concrete cleaner or mild detergent
Scrub the surface with a stiff-bristle brush
Let the cleaner sit for a few minutes if needed
Rinse thoroughly with clean water
Repeat on stubborn stains
Use a pressure washer for large or heavily soiled areas
Treat oil stains with a degreaser or absorbent material
Use a concrete-safe stain remover for rust or mildew
Allow the concrete to dry completely