Luckily, as of today no.
I do have screws in my knee! But that doesn't matter... and no, the magnet won't stick to my knee

Hi all, My name is Jack. I have been reading the forum for years. I have found tons of information that helped me a lot. Thank you. However I am posting for the first time as I wasn't able to find further information. The company that sold my mask, a F20, emailed me to let me know about an issue wit...