Cleanliness of the die head and flow channels directly dictates wall thickness uniformity. This guide outlines manual, solvent, and ultrasonic cleaning methods, alongside practical tips for optimizing temperature and back pressure. Mastering efficient cleaning can reduce downtime by 90% and extend the life of screws and molds. Whether facing carbon buildup or frequent color changes, these professional maintenance strategies will help your plant achieve a more flexible, low-cost production cycle.