My kitchen faucet is leaking. i cut the water off from the shut off valves and noticed it only leaked when the hot water side was on. i left it off for a few days till i could solve the issue but now it runs slightly even with the valve shut off. ive checked the rubber seal under the knob and noticed it was damaged so i replaced it but while doing so the water still continued to run even without the cartridge. not out of the faucet but from where the handle goes. what should i do?