Today, we will learn how to prepare a wet-mount slide. For this, you will need a glass cover slip and microscope slides. Begin by placing a drop of liquid suspension onto the slide. Here, we’re using green food coloring for easy visualization. Take a cover slip and holding it an angle, slowly drop the cover slip onto the slide. By adding the cover slip at an angle, it will reduce the number of air bubbles trapped between the cover slip and slide.