See, and there in lies my mistake I was using Wet bulb percentage for a regular Hygrometer. It's almost half the difference. Metzer Farms states the 78-90% but it's Wet Bulb not Hygrometer. I didn't realize there was so much difference.
Thanks
Good thing you caught that little tidbit! haha Wet bulb is expressed in degrees, like temperature, not as a percentage, so you just have to pay attention to the symbol to know which one they are referring to. I tried making my own wet bulb, and it worked while I had some water in there... but once the wick runs dry, its not longer a wet bulb! So you can't really use a wet bulb in a "dry" incubation. I have read that a wet bulb hygrometer is the most accurate overall though!