I opened my motorhome driver’s door on Saturday to go out for the weekend and was greeted by a swarm of houseflies which had been residing in the door seal! Probably around 30 and fortunately only a small number actually got into the van. I only came back from a week away in it two weeks ago! Has anyone else had this problem and how can I prevent it happening again? It was not at all pleasant and it certainly freaked the wife out!