Correct, large dangling rings of keys is death the ignition lock cylinders ..

I didn't say WD40 clumps up, you did .

What wd40 does is : wash all the accumulated dust and crud out allowing the now clean AND DRY lock to operate sans the lubrication it needs .

wd40 is trash and should be discarded as it always creates problem down the road .

The failure of some others to look ahead isn't my opinion .

One of my old Mercedes has over 420,000 miles on it's original cylinders, ALL of them . I copied the original key and it's fine, never jambs / sticks . I lubricate it with liquid graphite every time I think I can feel a difference in twist, about once a year .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better