Coldworking is what happens to the glass after all the hot, impressive stuff. Coldworking is why you don't cut yourself when you pick up a glass, or why that globe lamp has an opening big enough for your hand and a bulb to fit though. The cold shop, named because it's freezing all year round, is where the real glassworking magic, the cutting, drilling, and polishing, happens. The reason it's cold is because all the machines spray water out of them. At the end of the day I would leave the shop soaking wet. The water serves two purposes: it keeps the glass cool, as any temperature stress can cause it to crack, and it also keeps glass dust out of the air. Because that stuff is really, really bad for you.