Hot soapy water and a good grease cutting detergent (Dawn) is all you need. When you get it clean, rinse it in just about boiling clean water, and it will dry by itself in just a few minutes. I spray some WD-40 on all the metal when it's dry and also on a patch down the bore. Wipe off the excess. Just remember to swab it out before you shoot the next time. My scope sits in Leopold QR mounts, and I remove it before cleaning. Enjoy your new Omega!