Mega Snow Job is a very effective cleaner that is safe for use on awnings - able to remove a fair amount of dirt with no scrubbing required. Apply the snow as you would to the rest of the van, allow it to dwell for 2-3 minutes before pressure washing off thoroughly. Any ingrained dirt or mould can be scrubbed with a Little Chubby brush while the Mega Snow Job is dwelling, or afterwards with Sublime Clean. The Big Black One is handy for reaching up to the higher sections of the awning as well.