Most remotes use rubber keys with a conductive paint on the back of the button. They make kits to restore the conductive backing.
Classé CP-45 remote
My trusty old Classé CP-45 remote seems to have given up the ghost. The batteries are new and the contacts are clean. Signal only seems to be picked up very randomly at best. Any ideas on how to copy this on to a learning remote or anything else? Looks as though the company no longer exist after the 2018 takeover. Perhaps anyone know another company that uses the same code/signal?