The mechanics of maintaining your retractable awning is simple.  Once a year just add a drop of oil to the joints in the arms and manual motor.
 
Fabric maintenance for retractable and stationary awnings and valences:
The Do’s:

• Brush off all debris using a broom, particularly the underside.
• Once a month rinse your awning down with a hose.
• Gently scrub with a soft brush or rag with a mild liquid soap.
• Keep shrubbery and vines away as these plants contain acid that will damage your fabric.
• Check for rust and slices in your awning.  It is important that you fix minor problems before they ruin your awning entirely.

 
The Don’ts:

• Do not allow mildew to grow on the surface.  Even with mildew resistant fabric, mildew can grow on dust particles and destroy the color of your fabric.
• Do not fold or drag your awning.  If you take it down for storage make sure it is stored in a dry environment.  Avoid getting the fabric damp.
• Do not allow water to create puddles on your awning.  This causes mildew and stains.
• Do not use harsh soaps or rough scrubs when cleaning your awning.