Hi, I've always been worried about either infection, or scar tissue forming from injecting with a blunt needle, so I change my lancet and needle every time. It is what I have been advised to do over the years at various clinics/courses so doesn't feel unnecessary, but I appreciate many don't do that. I also don't have to pay for lancets so understand if you're left funding it might be a consideration. I have had to reuse a few times when I've been out and used all my spares, but have found reusing needles particularly painful which has always put me off, the close up pictures of blunt needles helps put me off it too!