Can I wear a biosensor if I have hairy arms? Yes, you can still wear a biosensor. However, you may want to shave the application area to get better adhesion. Related to Wear Related articles Are biosensors waterproof or water resistant? Can I wear my biosensor in a sauna or hot tub? Does applying a biosensor hurt? Why does my new biosensor give higher or lower glucose readings than my previous biosensor? Can I wear a biosensor over a tattoo?