During each call, it is better to open the microwave periodically. The mass will boil!!! CAUTION!!! DON’T GET BURNED!!! make sure it doesn’t boil off.
At the end of each session, take out, mix well. After each time, you will notice how the oranges will start to change color. They will become more transparent, similar to marmalade. And the syrup will become less and less, it will thicken.