Wssher fluid was low. Warning light came on. I filled up with bug and anti freeze washer fluid. The warning light kept coming on still after a minute every time I drove. I read about methanol causing the electronic sensor to stop working. I drained the fluid and refilled with regular blue water fluid and the light hasn't come on since. Just wanted to share because it was driving me crazy to have a warning light for no reason and it took me awhile to figure that out. No more methanol in the washer fluid!