I don't bother. I like the extra stuff on the glass even if it is unsightly
as it cuts down on light getting in.

Adds to the effect the shade cloth has.

"Gideon Singer" wrote in message
news
I have a "small" 8ft square polycarb panel greenhouse that every year
needs to be cleaned of algae. I was wondering, as I get ready for
another round of scrubbing and rinsing, what other people do to keep
their greenhouse walls clean and free of algae?