It also depends on the material.
On a regular TT, I don't think there's a way that works.
On vinyl heads, clearasil works fine. Put the hs in a zipper bag and be patient. You can renew it every two or three days, but the whole process can take months!
On a silicon body like phicen, don't do anything. The silicon will slowly absorb the stain. It can take months too!