When I try to wash or clean my car (I've been a little more motivated to regularly do this, since I bought my new black car), it just ends up being more dirty or streaky than it started out.
That's why I buy the discount coupons for the Acton carwash, where I happily take my ride through the sprayers and washers. As for the inside, we have all the "special" products at home, and I will use those on the interior, but when it's really dirty, like after a winter trip up north, I let DH do it, or I take it to the detail operation that's part of the car wash. This is one chore I don't have patience for.