I bought a used humidor off ebay and am having the same exact issues myself. When I seasoned it I wiped down the inside lightly with distilled water then put a shot glass of distilled water in it for a week. Then put about 10 cigars in it with a jar of Xikar gel and an Xikar hygrometer. My hygrometer only reads 61-62 as well.
I haven't tried the paper trick or the flashlight trick.
Where can I buy the Broveda calibration test online?
My preferred plkace to get all Boveda stuff is from Bovedas website.
It's cheap prices, easy to order, etc.
I also just want to echo the sentiment that the Xikar hygro in no way comes calibrated.
The fact that they market it that way is just messed up in my opinion.
I only have 2 of them, but they were both wrong out of the box.
Now, I do have to say that once you do get them calibrated with your Boveda test kit....they are great, they work awesome.
My only complaint with those hygros is that they claim to be already calibrated and that is a joke, I would venture to say that they are never calibrated.