I also had an issue with the conductivity of these buttons. I order about 30 pieces recently because I have had good success with these in the past. About 1/3 of them were fine and worked without any issues and the other 2/3 had conductivity issues. As mentioned by another commenter, the male piece (non magnetic) has a thin clear coating on it that prevents it from making good electrical contact. I tried soaking them in acetone, but that did not work. However, I was able to scrape it off with a razor blade fairly easily. The little circular discs that come with were also a problem, as they look like they were punched from recycled material. There was writing and designs on it and I could only remove them by using a dremel tool. I think it was odd that I received some that were bare metal and worked great and the others had coatings on the pieces and did not work until scraped. I hope this gets cleared up because I love this item!
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