Can I use creams or oils during biosensor wear? Please avoid using skin creams and oils around the application area while wearing a biosensor. These can leave residues on your skin which may make your biosensor come off early. Related articles Can I still use a biosensor after it expires? Can I wear a biosensor over a tattoo? Can I use biosensors if I sweat a lot? Can biosensors withstand hot or cold environments? What if my biosensor becomes loose?