I cleaned it properly twice, once with the proper bath and oil spray, the second time with just bath. I never had trouble with the oil coating, whether new or after my application. (It fouls MAFs.) I knocked out dust and debris dozens and dozens of times, probably every 2nd time I ever opened the hood, thus the slow disfigurement of the filter.
For comparison is the new K&N air filter I just got from Amazon.
It helps this site if you use that link and the other Amazon link at the top of all forum pages. I never get products for free, and this air filter is no exception. I pay full (or sale, when I catch them) prices just like you do for my Volvo parts and tools. Thanks!












