Well, I have a magic, a master magic, and a super master magic.

I have noticed on all of them, that a lot of the card tiles inbetween the plastic tiles have gone a bit wavy/rippled. It's quite noticeable.

I'm not sure if it's normal for this to happen over time, but I'm thinking it's probably down to a combination of high humidity in my room, and the tightness of the strings going around the tiles.

Now I'm going to either have to keep them in another room away from my other puzzles, or in vacuum sealed bags.

If I'm not mistaken, I believe some websites sell those little square pieces of paper for any magic puzzle (I'm not 100% sure, though). If I happen to be incorrect, or you would rather not spend money on such things, you could always make your own. Magic puzzles aren't too hard to disassemble and then restring. There are a few tutorials on how to do so on YouTube.

I know mine have done this over the years. I'm not too fussy as long as the puzzle function the same - which they do.

-d