Cannot get humidity down..

I used the salt test to calibrate my analog hydrometer (which I did twice to make sure it was properly calibrated). My digital hydrometer is reading the same thing as my analog, so it does not need calibrated. I used the salt test to calibrate my analog hydrometer.

I will get a bead humidifier here shortly. I have been looking around locally for them, but I cannot find them anywhere. Are they only available online?