Hi -- your link doesn't go to a specific anything, just that part of the forum.
I wonder if you've had the same problem as I -- do you have the same blue "peel-off" as many do? If you leave any residue from the peel-off (I think it's the so-called sticky-glue stuff that adheres the blue sticker to the aid) it DOES cause interference with the HA. I have learned to be super-slow and careful about peeling that off -- a clean peel-off causes no problems, whereas residue does. Could be that Walgreens is extra-sticky.