Eggs without their shell and whole boiled eggs shouldn’t be warmed up in microwave ovens as they may explode.
Do not use any metal utensils inside the oven unless they were supplied with the oven and for that purpose.
Do not warm up liquids or other food in closed recipients as they may explode.
Do not warm up pure alcohol or alcoholic drinks. DANGER OF FIRE.
When in doubt, choose short periods to cook, heat or defrost food with microwaves. With long cooking periods the food may become dry and even begin to burn.
Do not use the oven for anything other than warming, cooking or defrosting food.
Do not operate the oven without its tray nor when empty.
Keep the oven ventilation holes open. Never cover any air vents or openings.