Fill your bathtub with lukewarm water. Add the correct amount of neoprene wetsuit shampoo to the water. Many shampoos recommend adding 1/2 oz. of shampoo for each gallon of water. However, you should check the instructions for the shampoo that you are using for the proper amount.
Place the wetsuit in the water and gently swish it around in the water to remove the sand and debris. Make sure the water gets on the inside of the suit as well.
Turn on the shower and rinse the wetsuit with lukewarm water. Rinse the inside of the suit as well.
Hang your wetsuit on a wide hanger and place it on the shower rod to dry. Once it is partially dry, hang it up in an area that isn't as wet and humid as the bathroom so it can finish drying completely. Keep the wetsuit out of direct sunlight, as the sun's rays will cause the suit to wear prematurely.
Open the zipper and squeeze a fine line of zipper lubricant down both sides, concentrating on the outer teeth only. Close and open the zipper several times to make sure the lubricant reaches deep down.