Peter R - A very interesting idea - does the rag actually get wet? I
wouldn't think there would be enough natural draft to flush the
crankcase of a hot engine with only the breather to supply air.

Idea - Maybe a small 12V cooling fan from a dead cpu etc powered from a
wallwart, set on the oil fill to help exhaust the moisture from the
crankcase? or is there enough natural draft from the heat of the
engine to do this?