chair is inherited and very comfy but a cat peed on it at some stage and I can smell it every time I sit in the chair. I've tried various odour neutralising sprays to no avail, I've send the cushion off for dry cleaning but the smell is clinging to the fabric of the chair itself. There must be some way I can get rid of it?! The cat has been gone for a number of years now so it's 4- to 5-year-old pee 