Keep losing my skip, it is slow and very magnetic, but I've become creative with the dots. Here I placed one on the inside of my leather belt I wear daily. I stuck it under a cedar chest overnight to smoosh them together. It unlocks my phone quickly and easily even through the leather, a shirt hanging over it, and even a light jacket.
I may try to coat it with some super glue, but after three days the dot seems pretty well bonded to the surface of the belts interior.