I've had my M1 Air for about 15 months now and it's been an excellent machine, light, silent and more than powerful enough for my use case. There's just one thing that I'm a bit unhappy with, and that is the keyboard keys. The more frequently used ones have become very glossy, the keycap legends are perfectly legible so it's more a question of aesthetics. I'm cautious about cleaning them with anything that may cause damage, I've tried spectacle lens wipes but it's as though the matt surface has worn through to show the glossy plastic below. I take it that this is down to the materials being used and that everyones keyboard will look the same, or is there some way of cleaning the keys that will restore them to their original condition?