The art of the dry burn is hard to get right. With the Protanks, you need to know what grommet you have between the pin and the base. If it is clear-ish, it is less likely to get burnt in the process but if it is a drab white, almost yellow-ish color, it is rubber and if you burn the grommet in the process, you will ruin your tank. That burnt taste will never go away.
When/if you do, you should soak it in water, let it dry..........remove the chimney and the chimney silicone, flavor wicks and dry burn.......in short pulses (like 3 seconds) until it burns red. You can blow on the coil between bursts to cool it off. Once everything is off the coils, wash it out again and give it a night or a day to dry and re-assemble. Make sure your flavor wicks go back in the exact right spot or you will have leaking or replace.