parrotbee,
I have used “green paper” since 1988 when I bought my LP12 and provided by my dealer. No harm to any of my cartridges. Few but Linnies know of it.
In lieu of green paper; I have been told the “striker” portion of a cardboard matchbook cover could be substituted.
Have never tied it because I have “green paper”
Also have tried and used just about all the other methods on the market.