To keep your awnings looking their best, make sure that you rinse them off on a monthly basis. This keeps the dirt and grime from getting into the fabric and will reduce the number of times that you truelly have to deep clean them. When it is time to give them a proper cleaning, first remove all loose soil and dirt with a brush and rinse them thoroughly. Then, create a mixture of Borax and warm water and scub in with a soft brush. Allow solution to soak for about 10 minutes and then rinse thoroughly. Allow to dry and brush off any loose particles left by the cleaning solution. If your awnings are heavily soiled, you can add a small amount (about 1/4 cup to each gallon of water) of chlorine bleach to your cleaning solution. Every time that you deep clean your awning is the best time to reapply water repellant. Find out from your awning's manufacturer what type they recommend and apply after the awnings have thoroughly dried.