Same experience as I'm having. I guess he's responsive when he's taking your money, but goes missing when there's a problem to deal with.I too bought the 65% beads from heartfelt and mine are reading ~ 70% RH with several different hygrometers.
I have emailed David with no response as well.
My bag for the the 1lb clearly shows 65%. The instructions say they are ready to go out of the package.
That's exactly what I have done. 70%