Gave mine it's first clean today. I had forgotten the wheels were supposed to be shiny. I've used showroom shine, the waterless car wash. I've used it on my past three cars. The only time they've ever been power washed is when they've been in for servicing. It's good stuff, but it takes a while if you want to do a proper job. Had the car for 4 weeks now and liking it very much. Costs wise, I'm using less than half of what I was in my previous diesel car whilst also doing a higher mileage. Their figures ... approx 68 mpg compared to 41 mpg in the old car. I've not bothered to work it out accurately myself as yet.