We've been at it, 100% faithfully, for almost a month. The corns I hulled before starting are growing back normally (not black or anything promising). They are almost flush with the pad, and as noted earlier I will start the duct tape once they are, though I am disappointed that your results are not better.
FWIW I have been using press-and-seal rather than baggies - less fussy for me, but obviously no difference to the outcome. Next week when I go down to my old neighbourhood to do some shopping I am going to pick up some of the Thuja pellets - figure it can't hurt.
(Edited to correct the name of the plastic wrap.)