If you own a pair of white shoes or have ever tried to remove crayon from a wall, you’re probably thankful for melamine sponges. These products practically erase tough stains and scuffs through their unique abrasiveness and without additional cleaning products. But these “magic” sponges shed microplastic fibers when worn down. If you own a pair of white shoes or have ever tried to remove crayon from a wall, you’re probably thankful for melamine sponges. These products practically erase tough stains and scuffs through their unique abrasiveness and without additional cleaning products. But these “magic” sponges shed microplastic fibers when worn down. Environment Phys.org – latest science and technology news stories