Carefully scrape the big chunks off with a Popsicle stick then saturate with awesome and role it back up for an hour. When you unroll it have the hose ready and rinse, that usually takes everything off. You might need to do a light scrub on it but now much. Mine was filthy along with the pitch so I mixed a batch of 50/50 awesome/water and put it in a pump sprayer. I soaked the awning and rolled it up for an hour or so. While it was rolled up I scrubbed the exposed area near the top of the rolled up awning.
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