In case it saves someone time and effort, I want to mention that I tried a number of things to get rid of the musty smell in my featherweight case that did not work for my -- perhaps because the musty smell was so bad and/or because I am so sensitive to odors. I tried the bar of soap, Bounce sheet, and leaving open out in the sun for a couple of days (and probably some others I don't remember). None of these were enough for my case. It wasn't until I stuck the charcoal OdorEaters shoe inserts in there and left it for a couple of weeks that the odor was truly gone.