For those reading along, I'll state what I stated earlier in this thread somewhere: adhesive residue from patches can be easily removed using a 3M Tegaderm, which is applied and left on for about 10 minutes, then removed along with the adhesive from the patches. It took me over 3 years before I'd figured this out.
Having said that, Tills, I'm sorry patches weren't getting your levels to where you needed them. I had the same issue.