<p>My V1 sensor reached a point where wiping with a cleaning cloth or damp swab no longer returned the LCD to a functioning state. I tried cleaning with isopropyl alcohol, but it did not seem to work for very long either (maybe got a little worse). In desperation, I used a very tiny dab of citrus-based hand cleaner (good against skin oils) with a mild pumice abrasive (to polish surface, like a lapping compound) on a swab, then several damp swabs to wipe it dry, then an air blow off (careful - do not freeze). Sensor and LCD have been working good for over a week. Worked for me - try at your own risk.</p>
