Another option for small hand tools is to fill a 5 lb. coffe can with a mixture of regular sand and oil (used motor oil works fine, but you could probably use mineral oil or some type of vegetable oil to be a little more environmentally friendly).  After using the tool, plung it into the sand a few times -- it will come out clean and lightly oiled.  This works great for polishing up rusty tools, also.

A quick spritz also works on measuring spoons for sticky substances like honey, corn syrup, hoisin, etc...