Chortletastic You'll need to find one of those 'Hoovers' (a better term is vacuum cleaner as 'Hoover' is a brand name in a similar way that Sellotape is just a brand name of sticky back plastic tape). I suggest creeping into Wills bedroom early one morning and look up the royal crest on it - it will have some text underneath (something along the lines of "Slurp-o-Matic, suppliers of high quality phallus cleaning equipment to HRH Prince Willibobs") that should give you a clue as to where to get hold of one of these machines.
I don't think its a machine I think its a small regiment of ladies. They occupy their own wing of the palarse and spend their days lounging around wearing ill fitting shirts, with gym knickers, watching re runs of 1980's Blue Peter episodes until (and you understand it can be at any time of day) a bell rings and a light flashes, which is their signal to get to it and hoover (Vacuum) a Royal Foreskin