Bluonics 6W UV Replacement Bulbs, 2-Pack for Under-Sink Drinking Water UV System, RO Add-On or Stand-Alone Unit, 4-Prong Lamps

burnt out bulbs

I guess the bulbs may have gotten wet. I could not tell. One lasted three months the other a month. I have purchased a third and tightened the cap as tight as it will go. If I have another one go I'll need to contact you for help. I must be doing something wrong. I am sure I have the "o" ring on correctly...?.