Why can't I clean my PCV valve?

PROBLEM SOLVED: I used the technique that Slant Six Dan recommended and it cleaned up beautifully. I know that most guys think that its ridiculous to put this much time and thought into cleaning a PCV valve. I could just go out to NAPA and buy a brand new one for $3.95 and be done with it. But I want my car to be as factory original as possible, and the PCV valve that I had, while quite dirty, was an original correct part number valve that had the right date code for my car and still retained its original blue engine paint. I cleaned it up and installed it on my slanty, and it immediately started sucking oil fumes just like a brand new part. So now I'm a happy camper and have added to the originality of my car. Attached is a photo of my valve with its original paint installed on my motor. Thanks everyone for your input!

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