Clothes smell after a couple of weeks

After searching through the newsgroups, I haven't found anything on this problem so I am hoping someone here may be able to help.
I have lived in my townhouse for nine years with no smells developing in any closets. In the last six months, I started to notice that any clothes, in drawers or hanging for a couple of weeks, take on kind of an "old" smell. I am having trouble finding the correct words to describe the smell but it definitely is *not* musty (this is not a moisture problem, no mold or anything like that). Prior to this there was no smell at all. After washing the clothes and sheets, they smell fresh but if I don't use them within a couple of weeks, I have to wash them again to get rid of the smell.
Many thanks for any ideas.
Pat .............................................. email me : istuff at telus dot net
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snipped-for-privacy@verizon.net says...

You did so well I thought it should be cross posted to alt.home.cleaning! (where Pat L meant to send the original post)
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It aint the jeans that make your butt look fat.

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