19 Things You Should Never Microwave BySamantha Bansil, 08/18/2021 Gourmandize shares Share on Facebook Share on Twitter Pin it Share on WhatsApp Share on Google+ 3/19 Previous Next © Thinkstock Chili Peppers Heating chili peppers in the microwave can cause the capsaicin contained in them to vaporize. Once that compound is dispersed in the air, it can seriously burn your eyes and throat, and microwaves will only help it circulate that much easier.