To troubleshoot humidity-related issues in your refrigeration system, start by reviewing system design and operation parameters, including humidification and dehumidification rates, air flow patterns, and temperature control. Check sensor calibration and accuracy, and inspect humidification and dehumidification components for clogs, dirt, or damage. Verify that the system is operating within the recommended humidity range and adjust as necessary. If issues persist, consult system documentation, industry guidelines, or seek expert assistance to identify and address the root cause of the problem.