lorenbrothers
Senior Member
I made this same mistake on one of my old SLRs. Thought I'd be clever and clean the focusing screen with liquid. Needless to say I ended up with the same mess as you did. Never did get it back to normal. It didn't affect the final product but it did drive me to distraction for 8 years. 
Lesson learned: Don't mess with the focusing screen LOL
(highly doubtful it is on your mirror ... I would take it to another shop for a second opinion)
Lesson learned: Don't mess with the focusing screen LOL
(highly doubtful it is on your mirror ... I would take it to another shop for a second opinion)
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