Astronauts and cosmonauts on the ISS vacuum the station every week, making sure not to miss any spot.
When was this practice put in place?
What other cleaning practices when used before that?
The Salyut 6 space station apparently had a lot of mold, to the point that it was a deciding factor in its retirement, and the Mir space station reeked of mould, mites and degenerated into a disgusting orbital stinkbomb.
Is the vacuuming done on the ISS sufficient to avoid this and could it have been avoided had it been used on those stations?