1995 Volkswagen Jetta Oil Leaking from Air Cleaner Box

We have oil leaking from air cleaner box. Car is 14 years old and has 220K but its a preey good amount of oil. Have been told before that PCV valve gets clogged. Would this be the issue. Husband says its just because it sits and is only driven short distances 2 or 3 days a week. We had all gaskets changed about 5 years ago. Any suggestions or known issues. Thank you.