Buttons or touch keys respond intermittently or require very hard presses.

Safety first: Unplug before cleaning the panel.

• Clean surface: Wipe the control panel with a soft cloth lightly dampened with mild detergent. Dry completely.
• Avoid wet fingers: Use dry hands when operating touch controls.
• Check mounting: Ensure the panel is not flexing; tighten mounting screws if accessible.

When to call a technician: If responsiveness does not improve, the touch panel or controller may need replacement.