I just did ours today, and just used water, all the mold is gone. I bought a 4 or 5 foot extension to get to the higher vertical panels. I did not do the roof panels. By the way, this is the first time these were washed in 7 years, and I only needed to do this due to a slight green mold condition in areas of shade.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
Last edited by villagetinker; 04-28-2022 at 08:19 AM.
Reason: spelling errors....
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