It depends on what kind of greasy things, but if it's something edible or if I spill oil or something, I use a rag that is our designated greasy rag, and we use it to wipe and oil the cast iron stuff. It always is greasy, but it never has smelled bad or anything, I just wash it as best as I can in baking soda (I let it soak overnight) then rinse with water and vinager. I only do that once a month or so. But it's great for greasing the pans.