If I may Indulge? I used to service Photocopiers/Faxes/Readerprinters and the like. Did that for 11 yrs. We had one young chap who came along and was given a copier to clean etc. He dismantled the M/C, cleaned everything really well. He cleaned and polished the mirrors as well. Trouble was, he cleaned and polished the mirrors too well. When he reported in that the copies were crap, we discovered that he had removed ALL the reflective coatings on ALL the SURFACE COATED mirrors in the M/C. At around $50.00 a pop!!
Just the facts m'am.