Regularly (it is recommended to do it 1-2 times a month), wipe the surface of the solar panels with a soft cloth or sponge dipped in clean water to remove dust, leaves, bird droppings and other debris. If there are stubborn stains that are difficult to clean on the surface, you can use a small amount of neutral detergent to wipe, then rinse with clean water. Avoid using hard objects to scrape, so as not to damage the panels.