I ended up emailing my opthamologist as the watery eye was annoying me and the warm facecloth thing didn't seem to be helping. His receptionist tells me he's faxed a prescription to my pharmacy for Flucon drops (a type of steroid eye drop).
Peripheral and axial AS diagnosed October 2011 aged 50, more than 15 years after the symptoms started. Also PCOS, GERD/oesophagitis/dysphagia, IBS, asthma,chronic rhinitis. Taking enbrel, methotrexate, folic acid, omeprazole, vitamin D, metformin, steroid inhaler and eating low starch/low GI.