lid

Last weekend, I cleaned the cartridge as I regularly do, put the lid and the lock ring back and everything seemed ok. This model has no gasket or clamps and the lock ring clicks in place without any problems. The next day, I noticed there was leakage through the lid, what never happened before...

I DREAD having to clean my pool filter. I have a C900 Star Clear Plus. To get the lid off I unscrew the locking knob then have to use a rubber mallet to hit up under the lid lip to get it off. After I clean the filter and replace it I then have to screw the locking knob while constantly...