I've had this problem with both kanger protank 1 & protank 2: the threaded base gets stuck to the bottom and will not twist off! The protank 2 has the benefit of removing the glass but this is only adding to my problem. I can not for the life of me separate these pieces!! My thumbs are dying. Anyone else had the same experience and found a solution?? It doesn't happen all the time. I'm conscious about not putting it on too tight but the problem still occurs every so often.