I've replaced 3 faucet cartridges in my house. The 2 oldest repairs/replacements (replaced about 1.5 yrs ago) are still good. The most recent one is about 4 months old but it has started leaking again.
When I went to get the replacement cartridges, I brought the bad one to the store to match up so it should be the correct one.
Is there anything I should look at to fix it to stop it from leaking again? I doubt I did anything wrong since the other two are still ok, although it's not outside the realm of possibility that I made a mistake.
I plan to replace the rubber seats (the rubber thing sitting on top of the spring) first before I buy a new cartridge to try out but in case both of these steps don't work, what should I do since logically, replacing the cartridge should fix it?