Ask G. L. Pease (Volume 20)

(G. L. Pease) ... some tobaccos, especially stronger ones, just don’t taste as good when they’ve “loaded up” with the moisture and distillates from the burning tobacco above, while others seem to get richer and more flavorful as the bowl progresses. The same thing is true in cigars, where some smoke wonderfully to the very nub, whilst others begin to get harsh and acrid in the final stretch. So, it may simply be the tobacco you’re smoking, and no amount of technique will fix it. Continued