Lens Cleaning Problem

[Paul Stenquist]

I have a lens that seems to have some oily residue on the front 
element. I've tried Kodak lens cleaning solution and a microfiber 
cloth, but all i can do is push it around. I even tried a bit of window 
cleaner. That seemed to just make it worse. In the past I've always 
been able to clean a lens with the Kodak solution and the microfiber 
cloth, but it isn't doing the job on this one. Does someone have a 
suggestion?
Paul