Residential concrete cleaning in NJ typically costs about $0.15–$0.40 per square foot, depending on stains, size, and access. Hot water cleaning removes dirt, algae, oil, and grime from driveways, patios, sidewalks, pool decks, and steps. Concrete takes a beating in New Jersey. Driveways collect oil, tire marks, pollen, dirt, algae, salt residue, and dirty rainwater…