Audio Additives Stylus Force Gauge inconstantcy


I recently purchased an Audio Additives Stylus Force Gauge and it is driving me nuts. I get inconstant readings every time I lower the stylus onto the little black dot on the plate. Without moving the arm, every time I lower, raise, lower, etc., I get a different reading between 1.68 - 1.88. The batteries are new, device reads 0.000g at start up, calibration checks out using supplied weight, room temperature is 72F, no interference from tonearm lifter and everything is level.
Anyone else have this problem?
B0747886 6432 4f64 8072 828e5a7f3041seasoned
inconstantcy
Put a pair of Depends on it. Should do the trick. Or let it out with the dogs. 
Go onto Amazon and take a look at the Riverstone Audio gauge. $28.95, none better.
Agree 100% with @bdp24 

Bought the Riverstone few years back and never looked back.

Extremely accurate and repeatable, really like the drop down bracket so stylus is then at same height it would be playing vinyl.