Sinistered disk prior to crc column, if you have a by pass then by pass, if needed to clean crc down as well then run warm tane through it as well with paper filter on crc to catch particulate, but running warm tane through is a great idea anyways as you’ll be cleaning yourself solvent & of course prepping tanks.
On occasion at least 3-4 times a week disassemble & wipe down clean all stainless with etoh no iso as you don’t want to leave a additional residual & most folks are getting iso from stores not lab supplies.( not sure what y’all may get.)
Make sure to re-tape seals as often as you remove a nut. It seems to make seal cleaning easier with coconut oil as well. I suggest liquid oil or keeping a warmer for the oil so it’s easier to work with & doesn’t solidify making work harder.
Always check your nuts