OK, so window-cleaning robots cannot deal with traditional windows. I know textured glass interferes with the suction and, predictably, handles and fixtures interfere with the movement, but it also struggles with astragals that aren’t thick or solid enough. I wouldn’t risk using it with any that aren’t finished in hard plastic or something else durable.

I figured I’d give it one last chance on the upstairs bay window, as it’s a PVC replacement that was put in before we moved in, so it has thicker astragals finished in hard plastic. Using it one story up gave me serious anxiety. After an alarming five minutes or so of watching it loudly and…

Read the full article at WIRED.COM