Having just looked into the caravan today I discovered it was crawling with ants! I have not had this problem before and the caravan is parked where it normally is. I have hoovered up all that I can see and spayed ant killer in the corners of the van and around the obvious vents in the underside. I am pretty sure that this will do the trick but wondered whether anyone alse has had a similar problem? I am new to caravanning hence the question and no there wasn't any food left in the van - thankfully!