How do you properly adjust and maintain bathtub knobs for optimal water temperature and flow?

To properly adjust and maintain bathtub knobs for optimal water temperature and flow, start by turning on the water and adjusting the knobs to achieve the desired temperature. To maintain the knobs, periodically clean them to prevent buildup and ensure smooth operation. If the water temperature or flow is inconsistent, you may need to adjust the internal components or seek professional help for repairs.