First of all, unplug the power supply, and then take a dry rag to take out the debris, meaning, with a dry rag, the debris connected to the rag, and then thrown away, after that, with a wet rag, or toothbrush, carefully wipe the debris of the sticky place, be sure to carefully wipe, and finally, wipe the entire interior of the microwave oven again.

If there is an odor, you can use some, such as fruit and so on, and fragrance, and edible things square in the microwave, to put on a period of time before.