The latch wears out before the lock, in many cases.
Replace the part shown in above photo.
Christopher A. Young
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I've had a Kwikset lockset on my front door for quite some time. When I turn
the knob clock-wise, the doo-hickey that engages the strike plate works as
expected. When I turn it counter-cw, the doo-hickey binds up and the
door won't latch.
I've disassembled, lubed, etc etc. No help. The web site sez maybe
screws. I loosen, no help. Etc.
Something w-r-o-n-g here, I can't figger what. Apologies for my lack of