There's a product made to remove tear stains from dog's faces -- I can't recall the exact name just now, but it might do the trick. Do you know what your dog is allergic to? If it might be food allergies, you might try switching to a chicken and rice formula or a lamb and rice formula as corn and wheat are biggies on the food allergy scale while rice is very low there. You also might try some hydrocortisone to make the spots less itchy, ergo, less licking. Let us know and welcome to the site.