How to wipe a cill off.
How to ask if a woman who answers the door when you knock if she has a regular window-cleaner and when she says no and looks like she wants a quote you are able to stop yourself from gawping at her generous cleavage and cum-on smile that she uses to try to gain a discount.
How to price up a 3 bed semi-detached house on a regular monthly clean, with no conservatory and unlocked back-gate.
To be able to identify the difference between a carbon fibre water fed pole and a BOAB.
What course of action to persue when out canvassing you accidentally come upon an area of residential properties displaying a 'NO COLD CALLING' sign.
How to discuss in an adult fashion a complaint by a customer about the quality of work they have recieved from you, even if they are being unreasonable, it is the 'time of the month', your van has broken down/been smashed up and how to rectify the customers complaint.
Answer em all and you're a qualified WFP operator (Winker For Poland)