Don't mess up the fuzz button. If you end up scrapping, you'll find that the gold brillo pad looking piece is actually a single strand, likely beryllium of some sort. We played with those things constructing coupled cavity TWT's for some radars that would cook you along with the food.
Unless the fix is really straightforward, be careful as even the lowest power microwave ovens these days depend on devices like these, and excellent/effective shielding, to keep from shriveling your berries.
