Scuba Diver Australasia + Ocean Planet
The Emulsifying Method
This is my personal favourite method and can be used on both glass or acrylic ports. The best product I have found for this is Sea Drops Anti-Fog. When you smear Sea Drops all over your port, it will emulsify with the water it contacts and create a thin smooth even covering of water, just like it does in your mask to prevent fogging. Obviously fogging isn’t the issue here but whilst your port is covered evenly in water, it can’t form up into beads. For this method to work, the port needs to be spotlessly especially clean of grease such as fingerprints and sunscreen. Grease on the port will break the water tension across the top of the port and form beads – the last thing you need. This method also does a great job of hiding scratches on your port.