https://techcrunch.com/2019/08/27/lucids-drone-is-built-to-clean-the-outside-of-your-house-or-office/ > Building exteriors tend to get gross. Dirt clings to the walls. Windows get filmy. Spiderwebs amass. If you live in a particularly humid area, mold and mildew can start to make exterior walls look like a science experiment. > On taller buildings, scrubbing it all off generally means bringing a bucket truck, scaffolding, or suspension gear and having a crew hang from the side of the building. It’s a lot of prep work, with a lot of potential for falls and injuries. Lucid, a new company out of North Carolina, has a different approach: drones.