Well, I decided to show how I go about cleaning a Volkswagen oil bath air cleaner. Not just changing the oil in it but actually cleaning the coconut hair that's inside the top part of the air cleaner. Most times the oil in the bottom of the filter barely gets changed and the coconut hair rarely if ever gets cleaned. Here is how I did the one on the baja and it worked great. First, start off by cleaning both the upper and lower portion of the air cleaner with solvent. If you don't have a solvent tank, you can use kerosene or gas but be careful.