How do I maintain my window A/C so that it doesn't start to smell bad?
Last year I left my window a/c unit in the window, in winter I covered the unit inside, to keep the cold air out. It smells like mildew now, I cleaned the filter(not the source of the smell). looks like mold/mildew on the metal fins inside. So my question is, If I cover it from the outside, will this prevent the issue, this year?