What do we say before playing the ouija?

When you first begin using a ouija board, it is common to ask "Are there any spirits willing to communicate", your hands should be on the Plachette and if there are spirits around, the plachette should move yes.

If you desire to call spirits before hand, you can say something to effect of "Any spirits who wish to communicate, who are good and helpful, we are about to use a ouija board which you can influence to speak your message. Please join us."