Graham,I have listened to it a few more times. I agree that John was right with 'See if you can put your foot in the door'. However, I will stick with 'endless' coffee. I cannot hear 'Thermos' and logic would suggest that they would be unlikely to be drinking Thermos coffee in a house or flat that would have a stove. I cannot hear what you suggest for the really baffling line, but it's as good as anything else.
Regards, Stewie.