4. Sticking or Stuck Mirror, The SRT series has a foam stop or cushion at the top if the mirror chamber to lessen the noise produced, and the shock to the delicate mirror when it closes. This foam cushion can become sticky with age and cause the mirror to stay in the up position or delay return. A clue to this condition is foam residue on the forward part of the mirror. Repairing this condition is a simple process of replacing the foam. The foam is available from suppliers and not a difficult repair for the mechanically adept. Believe it or not, SRTs have been taken to the shop with a "stuck mirror" when all that was wrong, was the mirror lock lever was on.