How do I remove the rear view mirror button? My mirror fell off,buttons stuck in

I've been doing auto repair for a LONG time .. FWIW .. I see this happen more often in the mouth of September than any other time of year - seriously! .. I think it's expansion & contraction due to the the cooler nights along with hot days(?) .. Remove the small set screw from the mirror mounting 'base' .. That's what is holding the mounting 'button' in place! .. Depending upon on what mirror type or option you have, may have to remove a plastic cover on mirror base to access the set screw... IF all else fails, visit auto repair shop for mirror re-attachment!