In the controlled environment of a cleanroom, there is a constant battle against particulates. Specialized clothing and detailed cleaning procedures are put in place to help keep this environment in check. NASA cleanrooms are working on a unique way to keep things clean, and it involves snow.
Using liquid CO2 in a pressurized container, the liquid turns into snow as it is exposed to the air and is used to gently clean surfaces. This snow method is being used in conjunction with the James Webb Telescope to gently clean the delicate lens in the telescope. Want to learn more about this amazing snow? Check out the article over at Smithsonian Magazine.