The answer to 'how to care for deck' is to regularly inspect, clean, and maintain your deck to keep it in good condition. This includes sweeping away debris, applying a wood sealant or stain every 1-2 years, and addressing any cracks, warping, or loose boards promptly.
Start by thoroughly cleaning the deck surface using a deck cleaner or mild detergent and a stiff-bristle brush. Rinse the deck with a hose or power washer to remove any remaining dirt or grime. Once dry, inspect the deck for any damage, such as cracked or splintering boards, loose nails or screws, and signs of rot or insect infestation. Make necessary repairs right away to prevent further deterioration.