Properly cleaning and detailing your boat before storage is crucial to maintain its condition and prolong its life. Start by thoroughly rinsing the boat with fresh water to remove any saltwater or dirt buildup. Use a marine-grade soap and soft brush to wash the hull, deck, and other surfaces. Pay special attention to removing algae, barnacles, and other marine growth. After washing, apply a high-quality boat wax to protect the gel coat and provide a barrier against the elements. Clean and condition the upholstery, vinyl, and canvas using appropriate marine cleaners. Inspect and clean the engine, ensuring it's free of debris and properly lubricated. Don't forget to remove all personal belongings, food, and perishables from the boat to prevent mold and mildew growth. Consider using moisture absorbers or dehumidifiers inside the cabin to maintain a dry environment. Lastly, cover the boat with a well-fitted, breathable cover to shield it from dust, UV rays, and other environmental elements during storage.