Certain areas on my newly refinished hardwood floors have a white haze which is slightly oily on them. The guy said it was probably due to the high humidity; therefore, he came back and went over the floor again but the problem is still there. I am subject to believe that the surface was oily before applying the first coat of polyurethane and he should have made an effort to clean it off before reapplying. If I am stuck trying to remedy this problem my self, what can I do to remove these areas of dullness and oilyness? Thank you.