Two days ago I got my first paper strip music box, a 30-note one. I've been playing songs in it for the past few days and it functioned perfectly, no sign of damage to the gears which some recommendation pages for buying warned me about.
But just now I made the mistake of not checking the direction of the paper strip when I pulled it into the music box, and I put it in on the flat part at the end of the strip. It made a horrible noise of the notes all tuning at once and it got stuck, I couldn't pull out the strip by cranking, and in my panic, I yanked it out. I've tried to play a strip the correct way after that, and there are no notes missing from the song but the gears now are making this awful cranking noise. I've checked the comb and the spikes and they work correctly so I'm sure it's a problem with the gears.
I'm so upset about this because I was so excited about my music box, and also I need it for a school project soon, if anyone could give any advice it would be much appreciated.
Edit: I had my father look at the box, and he said that some of the gear's teeth are skipping, and If I crank the box more it could break, problem is a paper strip is in it because I was showing him the noise it made by playing a song and midway through he said I should stop cranking it. The problems now are: 1. Getting the paper strip out without cranking the mechanism 2. Dissasemble the gears (my dad says he could do it but he's never worked with music boxes before and h'es afraid that dismounting it could break it for good)