the lack of a PCV setup allows worn engines to put a bit of interior fuming out the breather, and the vapor when you shut it off is just hot, moist air rising .... if there's whiteish/brown crude built up on the inside of the cap and around it's spot in the cover, yer running the engine too cold, or "short tripping", and that will plug the filter material some ... not much to be done really, but you could clean the cap by sloshing it out with solvent ... and you could move to a warmer, drier climate
Bill
