In the winter months with low sun and a tendency to mist-up, canopy cleanliness becomes even more important.
It is part of the DI to ensure that the canopy is clean. It is the pilot-in-charge's responsibility to ensure the canopy is still clean enough before launching.
The only way to clean a canopy is by using copious amounts of clean water to flush off any dust or mud first. Then to use soft clean cloths to dry and then polish the surfaces with an appropriate cleaner.
Wiping with a sleeve causes permanent damage.
Wiping with paper towels causes permanent damage.
Finger-prints reduce visibility. Never touch the canopy with fingers (except touching the DV panel to slide it open from outside). There is absolutely no need to EVER touch the canopy with fingers.
DGS Safety Officer