Over this way, we mostly do our own car cleaning. I give the outside a wash, and Mrs Crank does the inside. Occasionally we have it done at one of the local car wash places, and they do a reasonable job for around a tenner. When I wash it, I never use anything other than water, and a car brush thingy, then shammy to dry. In the UK I always used soap of some sort, so not sure why really.
During my days working in Brentford, we had a couple hipsters valeting cars out in the carpark. A fella in our office used to keep horses, and his car was in a right state, straw and horse muck all over the place. He asked then to give it a good clean - they refused, and don't blame them really, but after that the joke was about them only wanting to wash clean cars.
Anyways, its a chore, sometimes you could nearly grow spuds on our car before I get round to cleaning it.