Manual Cleaning Methodology is to be found in the Link
https://thevinylpress.com/app/uploads/2024/03/PACVR_3rd-Ed-Ch1_2024-03.pdf
As for a Phonostage, the one in the Link might prove to be ideal for your purpose.
I become aware of this design by chance, and when investigating it, come to learn owners of some of the Branded Designs and models that were much more expensive Phon's, had selected the Digna Model to supersede them in use. This as a selection of discovered reports got my attention
My own model of the Digna, when having been Tube Rolled created such a good impression, it was out on long-term loans within my HiFi Group for a quite extended period and a few of these guys don't take prisoners.
My own model of the Digna is one that goes to the grave with me.
https://www.kleinanzeigen.de/s-anzeige/digna-ii-c-mr-nixie-phonovorverstaerker/3226853845-172-1764