The cleaning of today's fleet of aircradt worldwide has it own special requirements which are embodied into the Aircraft model. When you think about the problem it's enormous.
You've got areas as big as a tennis court, housing hundreds of people, covered in seats which form obvious obstructions to normal cleaning, and to cap it all, the aircraft has its own power supply at 115V/400hz.
The Numatic Aircraft vacuum cleaner range has taken all these considerations into account and are used extensively through the world.