After the vinegar fizzles out work in some laundry detergent using a stiff brush.
Clean stains off concrete patio.
Clear the area to be cleaned.
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.
Spray the concrete stains with the soap solution.
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.
If you want to remove stains that have.
Apply with a brush to mildew stains.
Rinse with clean water and repeat as necessary to remove the stain.
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.
How to clean concrete patio method 1 of 3.
Using the cleaning solution.
Finish by rinsing the area with a hose.
Make a baking soda and bleach paste.