Alright! I smacked it onto the floor in an attempt to spin and the lid flew off... and now will NOT twist clockwise (CW) back on!! And this, I believe, is why the cap could not be turned CCW and off. It was not turned CW and tightened as packaged- just friction fit on- so no wonder it could not turn CCW even with great effort. It already was ready to just pop off. This was certainly not apparent as the lid was tight on! So now, thank you, I will only use tape (can not twist it, anyway) to secure the cap... problem solved!