Using this windshield sunstrip is easy. First, make sure your windshield is clean and dry. Measure your windshield and then cut the sunstrip to fit it properly. Carefully apply it to the windshield. Note that custom cutting is necessary for a perfect fit. To maintain it, clean it gently with a soft cloth and mild cleaner. Avoid using harsh chemicals as they may damage the printed vinyl. This sunstrip is UV resistant, but it's still a good idea to park your car in the shade when possible to extend its lifespan.