Grout

[keithmac]

Poor ventilation...and because im a lazy git who doesn't wipe the tiles down as they should. The latter will change.

Same as ours, can't imagine my two kids wiping the shower down after they've finished, can't even pick the bloody towel up off the floor..

 

[Adam4868]

We've one of those Karcher type vacs in the bathroom,far too much work to clean up with teenagers.