Michael R, Rick S, Cheryl V

The exterior surfaces of the PMC mirrors inside the tank were cleaned today. Our cleaning method involved wiping the mirror's surface with acetone 5 times, followed by 5 wipes of methanol. All four mirrors were cleaned. The result is a gain of 10W in transmission, from 140W to 150W.

As of today, the interior surfaces of the input and output PMC windows, as well as the exterior surfaces of the PMC mirrors have been cleaned. The FSS and ISS windows have not been cleaned yet. We have gained about 19W total from cleaning both the windows and the mirrors.