Hygrometer at Walmart

Of course, just my luck. After more than 12 hours of testing, it was at 61%. Being as anal as I am, instead of just adding 14% each time I want to know the RH, I'm going to return it, hopefully to have a more accurate one. I bet going back and forth, gas is going to kill this deal for me.

edit: spelling
 
Well I went back to Walmart and picked up another one. Did a salt test for almost 24 hours and this one is 17% off. VERY disappointing and discouraging. I think I'm going to give up and just return it.
 
I bought two of these walmart hygro's myself after reading this thread. After 48 hours one of them is spot on @ 75 and the other is way off at 61. Not bad for 12 bucks or so! Anyone taken one apart yet and found an adjustment?
 
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