jumbojohn
This was part of your first post.
"....It is not unusual to find water bottles etc behind rudder pedals that not only add to a dirty flight deck but also contribute a flight safety risk......."
This was your second.
"I'm not talking about general tidiness but deep ingrained dirt."
What do you mean??
If water bottles behind the rudder pedals etc., is not included in general tidiness I don't should be.