Spray the concrete stains with the soap solution.
Clean stains off concrete patio.
Sweep up any debris leaves twigs etc and.
Let it sit until the black or green stains turn white but don t let it dry.
Mix the detergent with hot to warm water and using a stiff bristled brush or broom generously apply the soapy solution into the stain using a vigorous back and forth motion.
Finish by rinsing the area with a hose.
For an easy way for cleaning grease off concrete surfaces like your driveway or patio spread baking soda on the stained area and allow it to sit for a few minutes before pouring vinegar over the stain.
Mildewcide recipe pour 1 quart of chlorine bleach into 3 quarts of water.
Make a baking soda and bleach paste.
How to clean concrete patio method 1 of 3.
Add 1 3 cup of powdered laundry detergent.
To remove pour one eighth of a cup of liquid dishwashing detergent into a spray bottle then top off the bottle with warm water and shake well.
After the vinegar fizzles out work in some laundry detergent using a stiff brush.
Clear the area to be cleaned.
Apply with a brush to mildew stains.