In a microwave oven an oil and grease film can over time collect the floor, rotating glass plate and grate. In contrast to water, this grease does not evaporate and will become very hot in the microwave oven where it touches the bag. This can leave scorch marks on the bag and can even lead to damage of the bag. Prevent the bag from touching grease and recharge Pingi onin a clean microwave-safe dish. Please observe the recharging instruction and do not place Pingi directly on the microwave floor, grate or rotating plate.
If you notice brown stains on the fabric, discard and replace the item.