These are basically super mirrors. Have you ever tried cleaning the mirror in your bathroom to a spot free shine? Now imagine you had that outside, and you had

These are basically super mirrors. Have you ever tried cleaning the mirror in your bathroom to a spot free shine? Now imagine you had that outside, and you had to do it with bird poo, and dust, but you couldn't scratch the mirror, you couldn't use anything that would streak, and you have to be able to do it quickly enough that you don't interfere with the cooling...