I wanted to update that I replaced the driver side wiper blade recently, and wiping action has been smooth. It is a 26 inch blade with a U-hook attachment. Instructions in the manual note to replace the refill, but I just replaced the entire blade with an Optix beam style from my local Sam's Club, $10 and change plus tax. It wasn't easy getting the blade off the wiper arm for some reason. (There are instructions in the online web version of the manual on how to put the wipers in the service position, and how to remove the blade to replace the refill. I'm afraid I can't remember them off the top of my head).