What is the best way to troubleshoot a malfunctioning bathroom light?

The best way to troubleshoot a malfunctioning bathroom light is to first check the light bulb to see if it needs to be replaced. If the bulb is fine, then check the light switch and the circuit breaker to ensure they are working properly. If the issue persists, it may be a wiring problem and you may need to call a professional electrician for further assistance.