- 1). Park the Porsche convertible in a shaded area. If one is unavailable, clean the rear plastic window at night or in the garage. The sunlight, while cleaning, may damage the plastic material to the extent it will need to be replaced.
- 2). Fill the pitcher with warm tap water. Pour the water over the outside back window, removing any particles or debris. Use a spray bottle on the inside of the window.
- 3). Mix three drops of the dish soap in 2 cups of warm water inside the bowl. Use a mild dish detergent. Soak the rag in the cleaning mixture. Squeeze excess liquid out of the rag.
- 4). Open the rag and place iit n the palm of your hand. Start on the left side and press the rag gently into the window. Lift the cloth and repeat until the entire window is clean. Always blot the window, never rub as cuts and nicks can happen to the plastic.
- 5). Place the second rag in your palm. Blot the window again to dry.