A:Answer The rack is safe for microwave use. It is so you can heat two dishes at a time. However, they recommend removing it if only heating one item. That I do not really understand. I was leaving it in place when only heating on lower level and it was fine. But, when I placed a bag of popcorn on the bottom, it sparked when the paper bag inflated and touched the rack above it. Fortunately, no harm was done. Luckily it removes very easily because I really do not want to store it someplace else.
