the silver ring is easy to remove it pops out, take a round tooth pick (won't scratch face) and pry the right then left side remove ring the ball annd its housing will easily pop/pull out (pay attention to the orientation of housing / important for re-inserting) take toothpick clean contacts on circuit board. Blow without spitting into the hole. Re-isert housing, firmly press silver ring. clean the lil ball before you put it back I used vinegar a lil salt and dish soap worked great the salt acts like a abrasive , make sure it is dry befor re-instaslling All good!
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