I just had the most perfect bowl of Chartwell, a Tinder Box blend, that I bought when I bought the $45 no name pipe off their wall. It was fantastic until the last few puffs and I just had the most awful sour draw I have ever had. When I dumped it right after, it was a little wet at the bottom, but not too bad. This was a learning pipe and I may have been smoking a lot of bowls moister than they should have been and have had quite a few gurgle over my learning experience and discovering that I needed to dry out my tobaccos more prior to stuffing. What leads to this sour taste you get near the bottom of the bowl and is it something I can correct, or do I need to super clean the bowl after the possibility of some juice soaking into the bottom?