Not sure what keys are like on a chromebook but on many a laptop or indeed normal keyboard a canister of compressed air has blown many a keyboard problem away.
I’ve had trainees and apprentices with lack of proofreading, write in the learning journals they’re supposed to keep about the curse they’re studying - I always just cross my fingers and hope it really IS a typo or failing that just not aimed at me.ll
When this happened to me (it was my ‘c’) I cut one from somewhere else and used Ctl+v to paste it in every time I needed one. Pain in the behind, but it got me through until the nice young man in the Apple shop agreed to replace the keyboard (Perhaps I reminded him of his mother…)
In a strange coincidence, Facebook’s ‘one year ago’ this morning reminded me of this very incident.