I have a new microwave. A Sharp R-895M. It's one with convector, top and bottom grill as well as MW.
Doing a baked potato, exactly as per the book. The spud goes on the small metal tray.
I heard a funny noise and smell. The spud was arcing quite spectacularly as it cooked. When finished it was charcoal where it had touched the wire tray.
Rang Sharp and spent an age getting to the right bod." It's the "eyes" on the potato" he says. You must remove the "eyes" before you cook it.
????