That's most likely your problem. Pick up a digital one, calibrate it, and you should be good to go.

If your cigars feel and smoke fine, then your Rh is probably fine. The condition of your cigars is really the best way to tell if the Rh is good. Hydrometers only give peace of mind IMO. But if you want a meter, go digital. But keep in mind most of them are "off" by x%. You'll have to remember how off it is and add or subtract that from the read out.