He raised his wand as he spoke and half a dozen bottles came flying towards them out of the pantry, skidded along the table, scattering the debris of Sirius's meal, and stopped neatly in front of the six of them.
We've all used the microwave probably more than once to heat up yesterday's dinner leftovers, but as you guessed, there's a good chance that you've been doing it wrong this whole time.