re: Debris.
I know NASA is careful about emitting waste in space... everything during an EVA is collected and brought back to the station or shuttles, but even when they do a water dump, I wish that they wouldn't. Sometimes it may end up on the windows of the shuttles or station.
BTW, how do they clean the outside windows of the station? I've seen Suni using wipes to clean the station (handle bars, keyboards...). They must use a similar method when they clean the inside windows, but the outside (?!).
Just wondering while the subject came up.