My technique for cleaning mostly evolves around the ever amazing Polish poeple in Alton , North Hampshire.
Sequence of events goes like this :
1) Remove Tires and crap from boot and back seat
2) Take car to Sainsburys, Alton Train Station and nod at a friendly Polish person with pounds in there eyes.
3) Smile and hand them the keys then go shopping knowing i'm saving myself hours of hard labour.
4) Come back to shiny car and give away 6 Great British Pounds.
5) Go home and reload tires and crap ready for next drifty time.