I was given a very dirty Minolta Autocord + case with a load of other dusty gear -- well -- the Case fell to bits as i was opening it to clean it -- all stitches gone and camera was filthy -- so I cleaned outside with damp cloth = cotton buds and opened up the Mirror Box and nearly fainted at dirt on mirror and rear lens but cleaned it up with lens fluid and tissues and now it is all 'Pristine' and works well -- the test results at full aperture have been amazing !
i did a VIDEO about it -- you can see it here :
i did a VIDEO about it -- you can see it here :