Did you know that you can use an unglazed quarry tile (pick up one at HD or Lowes etc) – 6 or 8″ depending on the size of your toaster oven – to get a perfectly reheated pizza slice (s) ? Just like you were at the restaurant! Preheat the tiles at 425 for about 15 minutes.
Alternatively, if you’re not that anal, I always just nuke the piece (45sec) or pieces (1min), and while the microwave is running, turn on the gas flame (or elec burner) to medium under a non-stick frying pan. When the microwave beeps, slide the pizza into the pan from the plate you used in the microwave and let it sizzle for a minute or so. Suits me! Tell me if it works for you! Ask/About Lula