The answer to 'how to maintain stone walkway' is to regularly clean, repair, and reseal the stone to keep it looking its best. Start by sweeping the walkway weekly to remove dirt, leaves, and other debris. Use a mild detergent and soft-bristle brush to scrub the stones, then rinse thoroughly with a garden hose. Inspect the walkway for any cracks, chips, or uneven stones and address them promptly to prevent further damage. Every 1-2 years, apply a high-quality stone sealer to protect the surface from weathering and stains.
It's important to maintain your stone walkway to prevent it from becoming slippery or uneven, which can be a safety hazard. If you encounter significant damage or issues that you're unsure how to address, it's best to consult a professional landscaper or masonry expert.