i read awhile go to be careful when taking this tank apart but i didnt remember until it was all washed out and put back together. Is there a small washer that goes under the bottom screw cause i didnt see one come off. I'm asking cause now on one of my box mods it doesnt work on when it use to all it says is check atomizer. But it works perfect on others, is this something i can get myself at the hardware store or just order another one.