Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to repair a cracked surfboard [title] Clean the board and let it dry overnight. [step] Wipe the board down with a damp cloth to remove wax, salt, and sand. Use a cotton swab to clean out the crack, and let the board dry overnight for at least 6 hours.

Ending1: Before you begin working, squeeze the crack to make sure no water leaks out. [substeps] If the crack is still wet, or the board feels heavier in that area, allow it to dry for another 1-2 days before beginning your repairs. Ending2: [substeps] Break up your surfboard into four quadrants. This will create a unique mixture of tough and soft board material. Ending3: [substeps] If the board continues to crack for more than a week, do not attempt to repair it yourself. Using an electric flathead screwdriver is the only solution, and it can strip down your board, leaving you with extremely cracked boards. Ending4: [substeps] When brushing the broken board, make sure to work all around the crack, and all under the band at the rear. [title] Repair damaged surfboards online or through auto parts stores.

Answer format: ending1/ending2/ending3/ending4