I’ve got an Elddis Autoquest 52 plate and I’ve got to my motorhome today and I can’t lock my habitation door from either the inside or outside. All I’ve done is spray it with a bit of WD40 because the mechanism is a bit stiff. I’m currently in Wythall but have an exterior safe door lock so could travel. I’m going away in it on Wednesday so need to sort it out asap