The smell of mildew can be overpowering,
especially when dealing with clothes.
In my experience the best way to remove the smell is to wash the item in warm to hot water,
with Tide April Fresh.
Be careful to check the item that you are washing,
as hot water may shrink some materials.
Once the item has been through the wash,
another step that I like to use to add Fabreze dryer sheets.
These sheets will help remove the mildew odor that may still be present in your clothing.
if all else fails,
I might add some bleach,
but that is strictly if all else fails.