I too have that humidor and the gauge in it is trash. At least mine was
It passed the salt test while i was seasoning the humidor and then humidity seemed to be hanging at 73. Well now I'm pretty sure the needle got stuck because when I got my digital gauge it said the humidity had dropped to under 60. I acquired appropriate humidification equipment and things have been steady around 74. Well somewhat appropriate. I don't think it needs to be that high, but I've got about 5 cigars in it now which probably explains that.