[Chingas]

I'm with Bob and partly with Moses.

Pace your smoke about a minute is good. I tend to purge, (blowback thru the cigar) a few times thruout the stick. No really mathematical equation but maybe 5 times or so during a churchill.

That has eliminated tar build up at the head for me almost 100%

Still haven't found a way to eliminate the tar buildup in my nostrils tho...