So I have a MM Huck Finn and Legend and they both smoked great for a few months until suddenly they've developed a sour metallic taste I can't seem to shake. It happens halfway through a bowl. No visual sign of burnout, I've cleaned it thoroughly and left out in the sun multiple times to no avail. I've done a lot of googling on it and could be any number of things. The part of the shank that extends in the bowl is still there, could this be burning down finally? Or the glue at the bottom? Was trying to figure it out before I tossed them and got a few new cobs. The insides of the bowl look OK but they have gotten quite hot before but something tells me it isn't that. I did read a comment saying to let it dry out for a week in response to the sour taste, maybe I need to let it dry much longer in the sun. Thanks all in advance