[NavinF]

Have you checked your A1C (average blood sugar)? I wonder if this is caused by low blood circulation near the surface of your skin.

"Excess blood sugar decreases the elasticity of blood vessels and causes them to narrow, impeding blood flow"

[wildrhythms]

I think it's just dry skin. When I worked in corporate IT we had the same issue with Yubikey 'not working' and almost all of those issues came from people working in an especially arid part of the country. "Lick your finger" fixed it every time.