Is it normal to never close the microwave oven door?
My mother has a very annoying habit: she never closes the door of the microwave oven, instead she takes a glass and puts it in front of the microwave door. She says that she does it because closing the door is too loud and she doesn't want to wake up anybody. At first she only did this at night, but now she does it all the time. I've told her to stop doing it, but she keeps doing it.