At the family home, we've got a 2300 psi electric pressure washer. Anytime I have my bike(s) there and need a good cleaning, I don't hesitate using the pressure washer. I just make sure to switch the nozzle out to 40° and it does the job. I've been cleaning all my bikes this way for the last 14 years and helps rid of all the crud that builds up especially on the cassette and brake calipers.