Canvas cleaner for mooring cover

[bigdog]

Boat is on trailer parked in my yard, under some tall oak tree. I've noticed that mooring cover is getting both pollen and some mold. Unfortunately, this space where I have boat parked is the only place in my yard where I can store.

FYI, cover is navy blue, so anything with bleach is out of the question.
Looking for suggestions for cleaning canvas mooring cover.

Commercial cleaners, home remedies, etc. All suggestions will be apprecaited !

Bigdog

[chipj29]

I have used Greased Lightning on my pop up camper with good results. Spray it on, and scrub it with a brush. Make sure you give it a real good rinse.

[Knomad]

Take a look at this site for recommneded cleaning recommendations:
http://www.sunbrella.com/na/en/marine.pl