They are a nuisance
! I've threatened to cut it off and throw it away. Never to be seen again. Although, I do live in the real world........the wife likes it
and it gives good shade on those sunny days.
I spray a simple green or awning cleaner spray, real heavy, on the underneath where the mildew is. I spray top and bottom of awning all over. I scrub with a long handled semi-hard bristle brush. At times I've sprayed the simple green and rolled the awning back up for a little while to soak in. Don't know whether that helps any
.............I still have to scrub it after.
Cleaning an awning is just one of those unpleasant chores. Sometimes its just easier to have another cold one and plan on doing it tomorrow..........if tomorrow ever comes