I was very skeptical with the detox patches in the beginning just like you, but it has been working great for me since day 1. The STICKY BROWNISH GUNK of the patches is the combination of sweat, heavy metals, fats and those come from INSIDE your body through your feet. There're test results and medical researchs about the gunks plus the heavy metals.

Without the patches, honestly I don't think I can stay as fit as I am now. The only thing that I watch out for is to AVOID using patches made in Korea. ONLY use quality patches made in Japan.

Footbaths? Although I am not keen on putting electric devices in water with my foot, I don't think the mucky colour comes from rust. The footbath machine that I had, had diodes that are made from stainless; impossible to rust.

Billy

I was worried about that too, so did a lot of reading before starting with the pads. After more than two months, the pads are often white and hard in parts today, rather than brown and full of gunk as they were when I started. It therefore shows that something is changing and it can't just be sweat. Also I have noticed I am sweating a lot less from my feet than in the past, which is an added side benefit.
I would just suggest you try them yourself and see what comes out and how you feel - the change in feelings is incredible, at least it was for me. I don't really sleep better as some posted here, but the way I feel is an extra I can no longer do without.