The Hydrophobic Method

To dispel the water completely from the port, we can use waxing agents such as Rain-X or clear car polish. Rain-X is a product used to wax car windscreens to encourage water and road dirt to roll off it, and it does the same on a glass dome port. I say “glass” because this method is best used on glass ports; some products such as Rain-X may damage acrylic. Once the port is treated with the product most of the water should roll off when the camera is lifted from the water, and a quick shake of your camera should remove any remaining beads.