How do I choose where to apply my biosensor? Select an area of clear skin on the back of your upper arm.Avoid:• Scars• Moles• Stretchmarks• Lumps Things to note:• If you have hairy arms, shaving your application area gives better adhesion• You can apply your biosensor over tattoos Related to How To Related articles How do I remove my biosensor? How do I apply and activate my biosensor? How do I dispose of my biosensor? What is the maximum operating range (distance) of the Lingo app and biosensor? What do the glucose graph colours mean?