How do you fix windshield washer tank from leaking?

To fix a leaking windshield washer tank, first, identify the source of the leak by inspecting the tank for cracks or damaged fittings. Clean the area around the leak thoroughly, then use a suitable adhesive or epoxy designed for plastic repairs to seal small cracks. For larger cracks or holes, consider replacing the tank with a new one. After repairs, refill the tank and test the system to ensure there are no further leaks.