IMHO - I have learned that our trailer is no where near as sturdy (heavy duty) as a sticks & bricks or even a "top of the line" RV. The doors are built light because they are attached to a light weight aluminum door frame. These doors are not meant to be slammed shut. We push ours closed until we hear/feel it latch. The lock mechanism is stamped light gauge steel with some "pot metal" moving parts. When locking the dead bolt with the key, it is necessary to push in on the door slightly to reduce the amount of "torque" required to turn the key. I think if we were to just try to force the deadbolt to slide by turning the key only (without pushing in on the door), the key would probably break off in the lock. So - easy does it. We have learned - from this forum and, sometimes the hard way, that if we are gentle with the cabinets, doors, drawers, fixtures, etc., etc., etc., everything seems to hold up better.
If you have had 5 locks fail, something is amiss. It is either latch/lock alignment - you have had 5 defective locksets (unlikely) - or the locks are not properly installed or lubricated. Just sayin'
