Why does a metal rack in the microwave only spark if an expanding bag of popcorn pushes it off its holders? - Quora
![Amazon.com: DoubleWin Kitchen Microwave Oven Rack Shelf, Over the Microwave Stand Shelf Countertop, Metal Microwave Counter Stand, Toaster Oven Stand Shelf, Black : Home & Kitchen Amazon.com: DoubleWin Kitchen Microwave Oven Rack Shelf, Over the Microwave Stand Shelf Countertop, Metal Microwave Counter Stand, Toaster Oven Stand Shelf, Black : Home & Kitchen](https://m.media-amazon.com/images/I/71y2P05wZlL.jpg)
Amazon.com: DoubleWin Kitchen Microwave Oven Rack Shelf, Over the Microwave Stand Shelf Countertop, Metal Microwave Counter Stand, Toaster Oven Stand Shelf, Black : Home & Kitchen
![My parents' 31-yr-old Kenmore microwave, with metal rack and temperature probe (not shown). No, the metal doesn't catch fire. : r/BuyItForLife My parents' 31-yr-old Kenmore microwave, with metal rack and temperature probe (not shown). No, the metal doesn't catch fire. : r/BuyItForLife](https://i.redd.it/fiyaup5h7wx31.jpg)