Pilots should leave the Cockpit clean, many could do more!
The biggest issue is dust, crumbs and skin every where!
This needs to be an Ginger Beer function, i.e to maintain the aircraft.
This dust and debris does clog filters and does reduce component life. In one case even started a fire, fortunately the aircraft was on the ground in Corfu.
Keep the pressure up! We need clean Flight Decks!