The answer to 'sink maintenance' is to regularly clean and maintain your sink to prevent clogs, leaks, and other issues. This includes cleaning the sink basin, drain, and any visible pipes or fittings on a weekly or monthly basis. You should also inspect the sink for any signs of wear or damage, and address any issues promptly to prevent larger problems down the line.
Proper sink maintenance can help extend the life of your plumbing fixtures and prevent costly repairs. If you encounter any issues that you're unable to resolve on your own, it's best to call a professional plumber for assistance.