Common problems include pinholes, underexposure, and overexposure. Pinholes can be caused by contaminants or improper coating; ensure your screen is clean and apply the emulsion evenly. Underexposure may result in incomplete image development, making screens much harder to reclaim. Adjust your exposure time if this occurs. Overexposure can cause excessive hardening of the emulsion, making it difficult to wash out; reduce exposure time if this happens. Regularly test and adjust your exposure settings for best results.