Not dumb! I dampen Lettra sometimes to help with ink saturation–a damp sheet will require less ink and the solids will be more so. All I do is get a giant bag, spray inside it with water, and then spray every second or third sheet with water on both sides as I stack them in the bag. Then I seal up the bag, and put something heavy on top of the stack so that the water is encouraged to migrate through the stack. I let this sit overnight, and the next morning the sheets should be uniformly wet and cool–not soggy–to the touch. I’ve never had a problem with them curling when they dry, but you might let the printed stack dry under a weight too.