Concrete can be cleaned with numerous common household items, including detergent, vinegar, ammonia, baking soda, hydrogen peroxide, sodium peroxide and oxygen bleach. Chemicals should never be blended unless it's confirmed to be safe. A bristle scrub brush is ideal for cleaning concrete. Outdoor concrete can be cleaned with biodegradable detergent and a power washer.
Vinegar is an excellent household cleaning agent. It can be used in its pure form for especially difficult stains, or diluted with water for mild applications. Baking soda is an effective cleaner because its abrasive texture removes tough stains, grease and dirt. A blend of 1/2 cup of baking soda with 1 gallon of water is ideal for mild cleaning, and an equal mix of water, baking soda and salt can be used when a stronger cleaner is needed.
Another way to clean concrete is to apply sodium peroxide powder to the stain and allow it to sit for five minutes before washing it with water. Applying vinegar after rinsing with water neutralizes the sodium peroxide. Hydrogen peroxide provides similar results, and it can be blended with vinegar for additional cleaning strength. Oxygen bleach is found where detergent is sold, and it can be used as a thick paste for difficult stains or diluted as necessary.