An awning goes through a lot throughout the course of the year. Not only does it have to face beaming sun in the summer, it also has to withstand rain, snow, sleet, high winds and hail. That means that it can get filthy, so it will need a deep clean at least once a year. To do this you’ll need to detach the fabric from the awning structure and soak it in warm soapy water. Depending on the stains from dust, dirt and moss you may want to add a touch of bleach too but only if the material is strong enough to handle bleach. Check the label for more information on this. Once you’ve given it a good soak in soapy water, hang it out to dry and make sure everything is still intact. Once the process is complete see whether it’s looking fresh, if it needs a stronger cleaning agent you may want to try a carpet cleaning spray. Once complete hang it back up to be used again. It’s not a fun job but it’s worth doing once a year.