My rear wiper started to only work intermittently - I mean more intermittent than it's supposed to be.:rolleyes5: It stops mid sweep and I have to turn it off and on a couple times to get it to finish. Has anyone had this happen; probable causes? Another weird thing is now the rear washer sprays back and forth over the entire window, rather than just peeing in one spot as it has done for the last 5 years. This is great and does a much better job cleaning, but is it supposed to do that or is something loose?