Anco winter blades every fall and Anco regular blades every spring. They're cheap and they work great. Six months of exposure to sun, dirt, wind, ice, etc is about all you ask for for $6.00 each. Streaking and skipping are usually caused by road grime on the windshield, but blamed on the wipers. Use glass cleaner and scrub it, including where the blades rest when not in use, once in a while. Constantly grinding in dirt doesn't do them any good. This is especially important when you put new blades on. Auto mechanics do this to customer's cars so they don't come back with complaints. What seems like a lifetime or two ago I was an auto mechanic and yes, on occasion, people actually wanted us to replace the blades for them.