12
Cleaning the Lenses
Model QL73LEDSCENE
Federal Signal
www.fedsig.com
Cleaning the Lenses
CRAZING/CRACKING Crazing (fine cracks) of lenses causes
reduced effectiveness of the light. Do not use cleaning agents
(which cause crazing) such as strong detergents, solvents, or
petroleum products. If crazing of the lenses does occur, the
reliability of light for emergency signaling purposes may be
reduced until the lenses are replaced.
CLEANING the POLYCARBONATE LENSES: To extend the life of
this device, periodic cleaning is necessary. Clean the lens with
a mild, non-abrasive, neutral-pH cleaning agent and a soft, clean
cloth. Rinse the device thoroughly to ensure that no cleaning agent
residue remains. To avoid water spots, dry the device with a soft
clean cloth. Failure to follow this precaution can cause crazing or
cracking of the lens/dome and voids the warranty claims for the
light.
Clean the lens with a soft cloth and a solution of water and a mild
soap. If fine scratches or a haze appear on the lens, remove them
with a nonabrasive, high quality, onestep, automotive paste
cleaner/wax and a soft cloth.
