Water to get all dust, rock, animals off the plexi.

Plexus (or equivalent) before every flight, inside and out. Prevents
static that attracts dust. Makes canopy slick and easy to clean next
time.

Use a good cotton T-shirt or equivalent, wash often.

I never leave a canopy cover on for long (if tied down out west, put
the cover inside the cockpit, covering the instruments). Unless it's
blowing rocks, a cover does more damage than good, IMO.

After I clean the canopy (right after rigging), I put on a CLEAN
elastic cover to keep the cockpit cool until just before hookup (I
take it off from inside the cockpit while strapped in).

Kirk
66