I use a pressure washer but I set the nozzle in a fan pattern and reduce the speed of the engine on the washer to prevent over-pressure. I find I use much less water using the pressure washer than a regular garden hose. I would never use compressed air to blow off water as this forces water and misc. debris into cracks and crevices and seals. I do however use a leaf blower as it is not as direct as compressed air to blow off excess water and much less forceful. Oil Eater is great stuff as long as it is diluted. Dawn dish soap is also pretty mild and takes off oil and grease well. Wipe off the drive chain with either WD40 or Kerosene soaked on a rag - don't spray water and soap on it as you can wash the grease out of it.