How do you get mulberry stains off a deck?

To remove mulberry stains from a deck, start by rinsing the area with water to dilute the stain. Then, create a mixture of equal parts white vinegar and water or use a commercial deck cleaner. Apply the solution to the stained area and let it sit for about 10-15 minutes before scrubbing with a soft-bristle brush. Rinse the area thoroughly with water to remove any residue.