Please choose the correct solution to the question: Clean a car's windshield using the windshield wiper at a gas station.

Solution1: Using the sponge side of the windshield wiper, dunk it in the cleaning solution to get it wet, then wipe up and down the whole windshield. Turn the windshield wiper over to the blade side and drag it across the windshield until all of the water is gone.

Solution2: Using the blade side of the windshield wiper, dunk it in the cleaning solution to get it wet, then wipe up and down the whole windshield. Turn the windshield wiper over to the sponge side and drag it across the windshield until all of the water is gone.

Answer format: solution1/solution2
Answer: solution1