<human>:  How do I clean a copper roof?
<bot>: To clean a copper roof, you will need a soft cloth, warm soapy water, and a low temperature pressure washer. Start by washing the surface of the roof with the soapy water and a cloth. Next, rinse the surface of the roof with a low temperature pressure washer, as higher temperatures can damage the copper. Finally, allow the roof to completely dry before applying a protective sealant to preserve the shine.