I read awhile back and now I can't find it ( I think it was another site) about someone using a transdermal ph, letting it dry maybe 5 minutes, then applying the gel only (no ph) over top of the initial application. The whole idea was to transfer a higher % of the ph in. In theory, you should get maybe 30% on the initial application and an additional 20% from the second (30% of the 70% that didn't make it in on the initial application).
Has anyone tried this? If so, do you think it worked? Does this sound practical?