soak it for days in pb blaster. I have had some luck with putting air pressure into the inlet. Just make sure you aren't aiming it at anything breakable. What I do is wrap it in a shop rag to contain the flying parts.
1953 Chevrolet 3600 Fried Green T'mater (Vern) In the Stovebolt Gallery Caution: Political Statement Man who runs in front of car gets tired, man who runs behind car gets exhausted.