Need advice about a problem that has happened twice. Originally, the light failed turn on even after checking for a good battery. Contacted Olight and they suggested disassembling the tailcap and cleaning with alcohol. There was no visible contamination or debris but the alcohol cleaning worked. Just tonight the same thing happened. Light had been on the included charging dock which went from solid red to solid green. Took light off of charger and it would not turn on. Replaced battery with a fresh AA and still no luck. Cleaned with alcohol and it now works. Again, no visible debris or contamination. The light is mostly clipped to a pants pocket and is not in a dirty or greasy environment. Anyone have an idea about what is happening? I will say that Olight was very fast in answering my question to them. Thanks