Teenabee, don't put the bars, or straps or sticky pads [whatever you are using] directly on your face if you have metal dental implants. It causes leaching of heavy metals into your body.
Have the dental metals removed before you directly zap your face. Otherwise, you can zap anywhere else except where you might have a metal implant. {I have one in my arm, therefore I avoid zapping that arm, wrist, hand}
Pure water with a pinch of Sea Salt and a drop of Lugol'sIodine {NO Iodine if allergic} makes a saline solution that is safe to use in your nostrils 24/7. It cleanses the tissues.