You could remove the crank-end plug, and see if it will rotate backwards half a turn, or so. If it does and then stops again, pull the plugs like Mike said, and re-evaluate.
Mike, Walgreen model# WGNBPW Ver. A has been very consistent for me. The cuff is fully adjustable.
fwiw Mike, I stopped eating junk food a long time ago. That seemed to make the biggest differance you see,
I have always avoided sodium and don't drink anymore. Lost 63lbs.