I have a whole house water filter problem: every time I need to change the filter element I can't get the canister turned out of the top housing. I've broken 2 of the plastic wrenches, tried using 2 strap wrenches together and even made my own "wrench using wood and nylon rope. I contacted the manufacturer who recommended using food grade silicon grease on the threads and the O ring seal. I did that and was careful not to over tighten. It's time to change the filter and once again the canister housing the filter cartridge is jammed. I’m stumped and frustrated. :confused: Any ideas short of replacing the whole unit? I'm not adverse to that option, but don’t want to end up with the same problem?