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This photo, taken by MacBook owner "Hemingrey," shows stains that have appeared on the wrist rest and touchpad button.
Jose Munoz-Olaya, a MacBook owner and molecular biologist from Spain's Canary Islands, took this photo of his stained MacBook.
"They look like a shadow, grey in color and at first it was rather difficult to see. But things only got worse," he said. "As time goes on, the stains are more and more visible and nothing I can do will stop that."