I noticed that my protostar melted. I think I put it on a radiator before I went to bed and I woke up with the circular part with sort of a point. The yoyo still works but make a very ugly sound when I play it.
Has this ever happened to you
No, but I learned that heat and yo-yos don’t mix. A Whimsy Pokerface left in a hot glove box resulted in a warped cap on one side. Fixable, but I learned my lesson.