I clean mine with a long handled broom and a bucket of warm water added to which, depending upon how I feel, is either white vinegar or Safeway floor cleaner. Maybe try some neat white vinegar on a rag for the mouldy sections?
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"I beseech you in the bowels of Christ think it possible you may be mistaken"
Oliver Cromwell, 3rd August 1650 - in a letter to the General Assembly of the Kirk of Scotland
I tried this "sponge" (not normal sponge) damp on the underside of our awning a couple of days ago. Worked wonders. Five year old and looks new again. A bit laborious but well worth it. Definitely recommended.
We put the awning out, then put the legs under the van so the awning is against the van. Use a mop and bucket of water with a splash of bleach and clean the awning. Roll the awning back up before washing the water and bleach off. Leave for around 10 minutes. Unwind the awning again and squirt the awning with water. Easy peazy!
I actually did mine today. It was filthy. 80% vinegar 20% water sprayed on, rub with foam sponge, hose off. Then washed with mild detergent and water and finished off with Magic Eraser (from Woolies) and its come up like new. Good luck.
Rolled our awning up while it was damp and I had some insects stuck to the ceiling. Forgot all about it till getting ready for our recent trip.
So out with the truck wash for the outside and Koh for the inside/ ceiling. Good as new after some scrubbing love the product Koh great overall cleaning product always take a bottle in the caravan.
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Keep your eyes open so you can see where you are heading
I have just got a new awning and - on reading the instructions - they recommend wetting top with water and a splash of dish wash, roll up the awning, leave a few hours then hose top and underneath.
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'Once you are infected with the travel bug you have it for the rest of your life - there is NO cure'