I store my 'fish outside under a tarp. During the winter mice like to collect leaves for nesting under the tarp. When the leaves get wet they "stain" the deck. Quite by accident I found that if you leave the deck stains in sunlight for a few hours, they disappear!
Before discovering this, nothing worked to remove them: soft scrub, fiberglass cleaner, magic eraser, etc.
Fred
Before discovering this, nothing worked to remove them: soft scrub, fiberglass cleaner, magic eraser, etc.
Fred