Optex SE-Cond-D Instruction Manual page 6

To clean the sensor, first
wipe away lightly with a
clean soft cloth damped
by diluted mild detergent
solution and then wipe off
moisture with a dry clean
soft cloth.
A v o i d s t r o n g p h y s i c a l
shock to the sensor or do
not drop it.
6
Do not wipe the sensor
w i t h s o l v e n t s u c h a s
T h i n n e r . I t m a y c a u s e
failure.