I think it's the tobak. Dryer is better than wetter. 15% moisture is the ideal. However, good luck in measuring that. One would have to weigh tobacco pre-sauced and pre-moisturized and then weigh it again after topping and added water moisture. An easy test is to squeeze tobacco hard between your tumb and first finger. If it clumps, it is too moist. If it falls apart, maybe too much on the dry side. But, if it is just at that stage where it tries to clump and some does and some does not, it is probably perfect moisture.
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