What cleans red chalk line off metal roof?

To clean red chalk line off a metal roof, you can use a mixture of warm water and mild dish soap applied with a soft cloth or sponge. For tougher stains, consider using a non-abrasive cleaner specifically designed for metal surfaces. Avoid harsh chemicals or abrasive scrubbers, as they can damage the roof's finish. Rinse with clean water after cleaning to remove any residue.