It's generally recommended to replace your windshield wipers every 6 to 12 months, or whenever you notice signs of wear such as streaking, skipping, or squeaking.

Look out for signs such as streaking, smearing, skipping, or making unusual noises. Also, inspect the rubber blades for any visible damage or wear.

Some wiper blade models allow you to replace just the rubber insert, while others require replacing the entire blade assembly. Check the specifications of your wiper blades or consult with a professional.

You can clean your windshield wipers by wiping them with a damp cloth or paper towel soaked in windshield washer fluid. Be sure to remove any debris or dirt that may have accumulated on the blades.

It's a good idea to lift your wipers away from the windshield during periods of freezing weather to prevent them from getting stuck to the glass. This can help prolong the life of your wiper blades.

Streaking can be caused by several factors, including worn wiper blades, dirt or debris on the windshield, or a buildup of grime on the wiper blades themselves. Try cleaning both the windshield and the wiper blades, and if the problem persists, consider replacing the blades.

It's important to use the correct size wiper blades for your vehicle to ensure proper fit and function. Refer to your car's owner's manual or consult with an automotive expert to determine the correct size for your make and model.