My Hayward chlorinator is leaking, again. I replaced the o-ring and used silicone lubricant last month. Last night it was very difficult to remove (I had opened the motor basket to release pressure and turned the chlorinator off) and I noticed that the ring looked a bit stretched. This morning I come out to the thing overflowing like a fountain. I turned the pump off, released pressure, turned off chlorinator, and removed the cap. The o-ring looks a bit stretched, but it should’ve lasted more than just one month. What else do I need to replace, because I am sure that it is something more. 
