After each run remove the packing material. I use 8 copper scrubbers in my Clawhammer Still- After I am done running for the day I tap the scrubbers out of my column. I toss them into a bowl of white vinegar for 10-20 minutes and then rinse them really well with clean water. I then reuse them until they fall apart- I get quite a few runs out of them before I need to replace them.
I buy big rolls of copper mesh from a fairly popular website. They come in different lengths and are about 6″ wide. This way, you can make a roll that fits the diameter of your column, 2″, 1.5″, etc. Always pull them out and rinse them off at the very least when done with a run. As mentioned prior, a good soak in white vinegar is best. make sure and rinse off the vinegar, too.
I also use them until they fall apart, copper ain’t cheap.