OK - so i should have bought a UV filter and covered my lens from day one. Mea culpa. But it seemed weird to pay so much money for good glass and then cover it - until yesterday when my horse proceeded to schpittt gobs of saliva and half chewed hay in my direction while I was taking his picture. Obviously I carefully wiped the lens and camera (after scraping the stuff out of my own eyes, face, hair and clothes) but I need to do a more thorough cleaning. What's the best way? Oh - and I went out and bought a UV filter to put on and protect the lens once I get it clean. Help, please?