My home is a late-60s rambler inexpensively built with the clothes closets on the outside walls. The 2x4 studs are covered with what was once called Tem-Lok, then T1-11 siding. I'm certain there is no vapor barrier and the insulation may have Kraft paper, if I'm lucky. I applied Kilz sealer on the inside walls under the new paint. I'm using DampRid religiously. Annual rainfall is less than 20", though there is much moisture in the air all the time. My heat is forced air. Mildew accumulates on the clothes, shoes, etc. What can I do to alleviate the problem short of removing the siding and adding a vapor barrier? Thank you.