Do you ride in the rain as well? I'm thinking some of the blinkies may have taken some water damage seeping into the housing. Where do you mount he blinkies that fail constantly? I find the cheap Bell blinkie I got with the combo LED/Xenon light + tailight combo works ok and cheap as a secondary light. I mought htat tot he seat post while I have another blinkie at the rack. I find the blinkie under the seatpost hardly ever gets wet enough which I think would have water seep in.