I've got this meme EEG headband (muse S), which I actually do like, but the electrodes on the soft strap are degrading. They have to make electrical contact with skin, but the silver ink is flaking off the backing fabric. According to the manufacturer it's "Conductive silver ink on flexible fabric adhesive".

Ideas on how to repair this? I could get some more silver conductive paint of course, but given all the patch needs to do is be 1) conductive and 2) somewhat flexible, I'm wondering what else I could try. charcoal/graphite comes to mind. or aluminum foil, though I don't know how well that'd conduct to skin.