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Mix 1/2 cup baking soda to one gallon of water for a gentle cleaning solution. Add 1/8 cup of liquid dish detergent. Spray on patio surface, let sit for 30 minutes, then scrub and rinse. For heavily stained or mildewed patios, you may need a pressure washer.
Moreover, how do you clean a walkway without a pressure washer?
Spray the entire driveway with water using a garden hose sprayer. Dissolve 2 ½ ounces of washing soda in a gallon of hot water. Alternatively, sprinkle powdered dishwashing detergent over the entire driveway. Dip a deck brush into the hot washing soda water and scrub the driveway, rewetting the brush as needed.
Similarly, it is asked, how do I clean old concrete sidewalks?
Clean Dirty Concrete
- Treat the concrete with dish soap and water.
- Upgrade to a powder laundry detergent and water.
- Apply a scrubbing cleanser, such as Comet or Bon Ami.
- Exchange your brush for a pressure washer, starting over again with water alone and then working through the cleansers.
Use equal parts white distilled vinegar and warm water, then add a pinch or two of salt. Let this solution soak into your concrete for about twenty minutes.