Keeping dry
In certain weather conditions you're likely to find droplets of condensation inside your awning, even if you've taken every precaution to make it waterproof. This is especially true in nylon or polyester units and it is one reason these generally have breathable inner tents if you're using the awning for sleeping. If the water collects on the outer fabric however, it shouldn't drip directly on you at night.
You can minimise condensation by keeping a good airflow through your awning. Keep the vent panels open and make sure you don't accidentally block any low-level panels with items such as sleeping bags or storage packs.
Check the awning channel of your caravan or motorhome before you refit an awning. Sharp projections can tear fabric and knocks can close up the channel so it is difficult to thread the fabric. If you need to open up the channel, use a shaped piece of wood (or a proprietary awning rail spreader) for minor pinch-points. Seek professional guidance for more severe damage. A squirt of silicone-based lubricant or furniture polish along the awning channel can help if the fabric does not slide through easily.