Cleaning a neoprene swim vest is relatively straightforward. Here's a general guide:

Rinse after use: After each use, rinse the swim vest thoroughly with fresh water to remove any salt, chlorine, or other residues.

Spot clean: Before submerging the entire vest, spot clean any visible stains or dirt with a soft brush or cloth dipped in the cleaning solution. 

Hand wash: Fill a basin or sink with the prepared cleaning solution. Submerge the neoprene swim vest completely and gently agitate it to ensure the detergent penetrates the fabric.

Rinse thoroughly: After washing, rinse the vest thoroughly with clean water to remove any soap residue.

Dry properly: Hang the vest in a well-ventilated area away from direct sunlight to dry. Avoid using a dryer or hanging it in direct sunlight, as excessive heat can damage the neoprene material.

Store properly: Once dry, store the swim vest in a cool, dry place away from direct sunlight and heat sources.