Help with yarn that releases fluff

Hi... I made an amigurumi durian. The outer part is made of non-mercerised cotton yarn, which is releasing fluff that sticks to other parts of the amigurumi (these are made from a different type of yarn). Does someone know a remedy that makes it stop releasing fluff?

I read about putting it in the freezer, that's where the durian is now... but maybe someone comes up with another solution.

Thanks for your help!
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