We recommend inspecting cleanest of the lens surface before starting engraving. It is easy to clean the front surface of the lens if it becomes dirty when engraving, which may be done with Isopropyl Alcohol (IPA) and an optical wipe. However, in some cases, it can be necessary to replace the lens. It is recommended to purchase an extra lens with PLH3D-Series laser heads if they will be used in an environment where dust, smoke or oil are generated.
Regular maintenance of the laser head cleanest positively affects its lifetime, in some cases it may prevent from damaging the lens. Ventilation openings and fan must be kept clean and free of foreign matter. Remember to close the lens while cleaning laser head, for this we recommend using Kapton tape. We recommend using compressed air for cleaning ventilations channels or cotton swab (cotton buds) with Isopropyl Alcohol.