This was mentioned in a recent thread (can't remember which one), so I thought I'd give it a go just for the sake of experimentation. I loaded my pipe yesterday about 4pm for a smoke today noonish. I can't claim any cause/effect relationship, but it was a nice smoke that lasted longer than my usual and the taste didn't go "off" till closer to the bottom of the bowl. I usually scrape out the last 1/4 because it's either a bit wet and sizzles on relight, the taste goes off, or more common, a combination of the two.