My leather bags are all mouldy from the past couple of wet years. I have cleaned them all, but the ones I don't use are getting mouldy again (not to mention the shoes). They are all black so water marks don't worry them, even a light solution of bleach, but the mould grew back - possibly on the dubbin I used after cleaning.
Never mind - maybe I should use all my stuff! - We all have too much stuff!