Don’t you hate seeing that awful black mess caused by mildew stains around windows? Unfortunately, it is a really tough area to clean well, without leaving any mildew behind. Here is how.
Use bleach as your cleaning agent (it kills mildew) but then use an old toothbrush instead of a cloth to clean the mildew. The size of the toothbrush allows you to clean in the corners and edges that you wouldn’t be able to reach with a normal cloth or large scrub brush. Then use a dry cloth to wipe dry.