When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I always get moisture under the cap, could the cap seal be the cause? The seal looks flattened out and useless. Is it worth the effort to make an order just for that or am I looking in the wrong place.
In most instances I'd say clean it off and see if it returns. Other than that, not sure. Cooler weather and short trips instead of long ones ALWAYS causes moisture.