This $1,200 automated contraption is billed as a sophisticated, cordless robot designed to autonomously eat pool grime and scrub the waterline. Every fresh-faced digital nomad believes that pool maintenance is an acceptable proxy for socio-economic signaling. Owning it signals that your tropical self-care ritual is so refined, you don't even need a mere human hand. However, the machine's delicate infrared sensors will fail spectacularly when confronted with a single, rogue piece of discarded artisanal beer bottle glass on the pool's coping.