That seems like it should be something that keyboard makers put in automatically by now. Either that or make the back removable with just one or two (not seven or eight) screws or clips.
@creature also they should be splash resistant.
RIP Corsair k95
Something for eyelashes and nail clippings.

@creature so gross yet so true.
That moment when you notice a crumb, and try to flick it away without pressing the key and seeing in disappear into your electronics forever.