Stain removal is all about speed and technique. Here's the proven method for tackling mildew effectively.
Mildew spores can irritate respiratory systems. Wear gloves and a mask before cleaning.
Fill a spray bottle with white vinegar (no water added). Spray directly on the mildew.
Vinegar needs time to kill the mildew and its spores. Don't rinse too quickly.
Scrub vigorously. The mildew should come off the surface easily after vinegar treatment.
If staining remains, make a paste of baking soda and water. Apply to the stained area, let dry, then scrub.