Not a big deal but removing the whole thing is very awkward. The canvas part simply slides out of a track on the roller and a similar track on the trailer end. There is likely a small screw on the trailer track that stops the awing from creeping out of the track. You will have to unroll it to start and then find a way to stop the spring in the roller from winding back up while it is out. Mine required drilling a small hole in the end cap of the roller and sticking a nail in it to prevent it winding back up. Take care, that spring can be dangerous.
IMHO, it would be easier to clean it while in place by simply rolling it out and letting it hang down the side of the trailer by removing the bracing if this is possible on your model.