it's all good, they had masks and gloves and that was distilled water.
I thought distilled water could still conduct, just not as much as tap or rainwater (plenty of ions there). Wouldn't even a small amount of conductivity be a risk to a farm of expensive rigs all full of exposed soldered components? I would have thought so, but that clip kinda proves me wrong. Those LEDs are on. I wonder if that kind of cleaning requires any specific protections, like is anything coated with a grease inside? Hardened devices or plain vanilla? Fans handle it alright I guess?
Seems like an unlikely place for covid to be lurking, and every NOC I've ever visited was colder than a witch's tit in a brass bra, plus lots of air flow. All clean really should mean all clean though I guess, and those guys aren't playin. I presume the clip's creator assumed they were using isopropyl alcohol, or something similar. Distilled water does sound like a bit of a weak covid sanitizer.