I'd agree with
@PAN959, pressure washing is definitely overkill and can cause more problems than it cleans. There really isn't a need to "wash" your bike unless you ride through muddy conditions, just a quick cleaning session and you're ready for the next ride.
I clean my bike once every month/1000 miles-ish using a bucket, microfiber towels, a spray bottle (pre-soak), and Optimum No Rinse Wash and Wax. Bucket diluted to 1:128. Spray bottle diluted to 1:64. Technique described here:
Up Close & Personal: Optimum No Rinse Wash & Wax 1 gallon of water and two clean 16x16 microfiber towels cleans the whole bike. Spot clean rims with WD40 for any stubborn grease. Then, with leftover solution in bucket, I take my clean "dirty" towel (cleans rims only) and just wipe down rims. Takes me about 30 mins with probably half of that spent on the rims.