The answer to 'how to maintain deck' is to regularly clean, seal, and inspect your deck to keep it in good condition. Start by sweeping the deck to remove any dirt, leaves, or debris. Then, use a deck cleaner and scrub the surface to remove any stains or mildew. Once it's clean, apply a high-quality deck sealer every 1-2 years to protect the wood from the elements and prevent weathering.
It's also important to inspect your deck regularly for any signs of damage, such as loose boards, cracked or splintered wood, or rusted hardware. Address any issues promptly to prevent further deterioration. If you notice significant damage or safety concerns, it's best to consult a professional deck contractor for repairs or replacement.