Solar panels with dust or dirt on it can become inefficient and will reduce power output by blocking sunlight to the panel glass. A dirty air with dust or ash particles can fallout on your solar panels installed on a rooftop. To help your solar panel work efficient on regular basis, it is very important to keep on cleaning them regularly.
Cleaning your solar panel is not a difficult task and they can be cleaned by using basic materials, like, a soft brush, extended pole, a long hose which can reach to your panel safely, mild soap, and a bucket of water. You can use these tools to mildly cleaning your solar panel by rubbing and wiping water on it.