Zylight F8 Fresnel - Manual (Page 15)

Cleaning
Due to fog residue, smoke, and dust, cleaning the internal and external
optical lenses must be carried out periodically to optimize light output.
1. Use normal glass cleaner and a soft cloth to wipe down the
outside casing.
2. Clean the external optics with glass cleaner and a soft cloth
as necessary.
3. Always be sure to dry all parts completely before plugging
the unit back in.
Cleaning frequency depends on the environment in which the fixture
operates (i.e. smoke, fog residue, dust, dew).
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