empty contents. rinse with soap and water. rinse with clean water. dry
Additional Details added 5 years ago
ok.. so lets talk about the salt shaker and what it is made of..
ceramic, metal, glass or other..crome can spot and this might be cleaned off with a window cleaner. same as glass. ceramic i wouldn't think you would have a problem with spotting..
Wash it. Soak in warm soapy water until the salt has dissolved. If you have to, use a toothpick to push the salt crystals through the holes. After it's all dry, then do as I suggested so that it doesn't happen again. It is the moisture in the air that causes the salt to semidissolve and crystalize around the holes.