New answers tagged cleaning
I also have the 3100 and ave recently had the same problem. If you take off the lens and look at the edge of the screen, you'll see a rectangular wire that holds it in. Just push it free from the clip it's tucked under at the front and the screen will fall right out. Be careful: the focusing screen scratches really easily and then your view will always look ...
Ugh... NEVER clean film negatives with water. Use dry microfiber cleaning cloths, or - if you must use a liquid - try the PEC-pads, which are disposable microfiber wipes with the PEC-12 solution already on them. B&H has 100 packs of the PEC-12 4''x 4'' (10cm x 10cm) wipes for ~$8, as do many other photo-supply shops (and amazon, et al).
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