3 year user of an eko 40. Cleaning and serving the boiler today for this winter. Replaced the door after cleaning and noticed I could turn the door handle 360 degrees. The small piece of iron that locks the handle, has been slowly wearing over the past 3 years. I can see the bright shine on the back side of that iron piece. There is not enough material to keep the door tightly shut. Any eko owners seeing wear on that small piece?