@MatthewToadAgain@climatejustice.social hmm given what you describe, you may not have to clean them very often at all...maybe once every couple years? I wonder if there are others in your area with solar panels and maybe similarly-steep roofs who might be able to share what they do about cleaning. It would be a shame if you have the $ and the desire to get panels, and the only blocker is the unknown cleaning situation.