It’s important to keep your solar panels clean. Clean solar panels mean more efficient electricity generation, and also a longer life span for your solar panels. Solar panels should be cleaned at least every six months. Using the Jetts surface cleaner on low pressure, with just water, the solar panels come up shiny and clean. All the mould, grime, lichen, bird droppings and pollution gets washed away, leaving perfectly clean solar panels. These solar panels on a house in Maleny came up shiny and clean.