Well, there are different schools of though on this. In my personal case and use, dry has worked for shaving sharp. I unclog the stone(s) with water, just rinse and pat dry. I've read that the oil helps keep the stone lasting longer, but interferes with the sharpening (something about micro bits in the oil -- but I am not sure on the science). Again, in my personal use, dry works perfectly every time and my stone is over 10 years old. Oh -- for heavy refactoring I use a standard whetstone (home depot or wherever) also dry. Then finish on the Arkansas stones. YMMV.