Chosen Solution
I have something inside viewfinder (small black rectangle - maybe some trash or something I don’t know) how can I clean it? :(
Hi Rebeka, Try rubbing the viewfinder on both sides with a Q-tip. If you are certain that it is inside the viewfinder, try following the first few steps in this guide to open up the shell and clean out the viewfinder: Fujifilm Instax Mini Eight Camera Shell Replacement
