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The 2018 Kia Optima has a 26-inch windshield wiper blade on the driver side and an 18-inch blade on the passenger side. Windshield wipers are essential for clearing away rain, snow, or debris in varying weather conditions. They can also be used to clean the windshield with wiper fluid when it's dirty. It's recommended to use any brand of -20 Degree fluid in the Optima. Wipers should be replaced every 6 to 12 months or sooner if driving in harsh conditions. To extend their lifespan, you can wash them occasionally. When expecting snow, it's advisable to lift the wipers off the windshield to prevent them from freezing to the glass.
A 2018 Kia Optima requires a 26-inch wiper blade for the driver's side and an 18-inch wiper blade for the passenger's side.