I'm cleaning up after having a few chicks grow up in the bathroom. I'm scrubbing the floors but cannot remove the dried on white portion of their poo. THe urates? HOw do I remove this white dried paste without ruining my floors which are wood with a light coat of polyurathane? ( A wet rag moistens the green part of the poo and is easier to remove; the white portion stays stuck. ) I have a white spotted floor-- help! I want the spots gone NOW!!