I can attest to that. I used to rent an apartment that had two locks which opened with the same key. Both would gradually become harder to use until one of the

I can attest to that. I used to rent an apartment that had two locks which opened with the same key. Both would gradually become harder to use until one of them eventually broke, at which point I began to regularly lubricate the other. It lasted past the end of my rental agreement and was much easier to use when lubricated.