post-tephra catchment care

[TomK]

I still don't know what the core problem is. 

Well, yes you do. But, you just want to play your 4 year old self and argue about nonsense.

So treat me as a 4-year-old. What's the core problem?

I don't know either, but lack your curiosity.  Perhaps related to earlier posts in this thread about their use?  

Oh, now I see this is explained in the Bicker board.

A friend of mine used a blower on his catchment cover before pressure washing it on both sides.  I did nothing on my cover.  The winds prior to the recent rain storm seemed to clean it off fairly well.

You may be right. My perspective is that if you ask a question one way, then another, and the person making the claim still won't answer, then they are likely making stuff up.