I have a KBP V60 with laser etched keycaps. Only after a few months they becomes stained and the legends turned from white to uneven grey-yellow color. I tried many methods (denture tabs, detergent, toothpaste etc) to clean them but nothing works. I wonder if this is a problem with all laser etched keycaps. Also, is it better for those keycaps that has infill that's not white (like Poker or Type Heaven)?
