I have never tried the glad wrap method but going to experiment today as I rack to secondary.
I have a screw lid fermenter and will chuck the lid as the damn thing always locks on to the fermenter and I end up disturbing the yeast bed just to get the bloody thing off!
My questions are:
1. How loose must the O ring be to allow Co2 out but not air in? (I don't want badness getting in if too loose. And I don't want to carbonate in the fermenter if it can't escape. I doubt I'd get a fermenter bomb).
2. Is there any need to sanitize the glad wrap before placing over the fermenter?
Cheers, Bats.