To rewind the film in your LC-Wide,
1.) Press the Rewind Button on the bottom of the LC-Wide with your index finger,
2.) Turn the Rewind Lever clockwise until the tension slackens. Keep your finger on the rewind button while turning the lever. Don’t stop until you feel the tension completely drop off.
If you want to leave a bit of leader (for reloading the film or exchanging it for collaborative double exposures with another Lomographer), then rewind REALLY slowly and stop at the very instant that you feel the tension drop off. This should leave a good bit of leader left sticking out.