Logically..

When the gandark/mynock flying vampire, kisses the glass of the falcon,

in the next cockpit shots shouldn't be visible the remains of the juicy kiss?

So again logically they should clean it up when they leave again from Bespin, after the falcon got maintenance from lando's crew?

Or the falcon has windscreen wiper? :P

Plus when R2 tries to open the second door in the bespin exodus.. we see in the close ups that it still emits smoke from the electricity failure in the previous shots.. But when we cut to chewie, R2 in the background isnt emits any smoke.. :)

-Angel