[neoflex]

If the paper towel inside is still wet I'm guessing your hygro should still read higher than 65% unless there is a giant leak which I would think if it were that bad the dollar bill test would have been a big failure. Do you have another hygro to put in there along with the one your using now for a side by side comparison? Also is your hygro a digital model or analog? If it's not digital I would be willing to put the problem solely on the hygrometer and say the box is more than likely fine. I have had leaky boxes before but if I had a big source of moisture like a bowl of water or floral foam the humidity would still be sky high.