Ouija board, useful information from?

Now, I have read from people who did dabble in ouija board that they have seen the planchette move even without any participant touching it, or it being attached in any manner to anything mechanical or visible or detectable by 'empirical' means and ways to the planchette as to move it surreptitiously.Read the debunkers of ouija board and tell me if they also take up the reports of planchette moving by itself without any participant touching it.