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Thanks Melissa! My Oumnilux mask also went out (just blinking like Pat's). It was after i had it for about 1.5 years. It's now too late to request a replacement. ?? I didn't know I had two years. A good friend had the same problem at about the same time. I didn't think about mentioning it on the app. I should have I do miss it. We're both looking into which is the latest greatest to purchase. I plan on buying a different brand this time. Hopefully, there are advancements since 6\23.