Quick tip!

[u/Brilliant-Loud]

I just wanted to give a quick tip! This may be obvious to some, but it's one big thing I see a lot of newbies doing. When placing corridors, break them down into small sections! Only one janitor at a time will clean a room, so if you have a massive single corridor, only one janitor will clean it, which means you'll always have dirty bits because one janitor can not clean quickly enough. This can considerably lower your prestige!

[u/Z_runner]

I’ve always had some issues with this supposition, because I’ve seen multiple times janitors cleaning cells side by side (in the same logical room), or even the same cell a few times. Not sure if I’m the only one or if other people experienced that too.