If you use it, you clean it. This rule applies not only to the microwave, but to all kitchen appliances, dishes, and utensils in the office. Your mother is not at the office to clean up after you. Be responsible for yourself.
Simply wet a paper towel and wipe any spills or splatters that may have occurred while using the microwave. A great way to avoid splatters is to make sure your food is covered while it is cooking.
Failure to clean the microwave immediately after the spill allows the food to become encrusted in the oven permeating the entire office with unwanted odors.
No one enjoys the lunch or snack that keeps giving and giving and giving…