Tonochi's unique method of vinyl disc maintenance is introduced here.
Originally, it's not my original idea; it is a method that combines that of Mr. Tetsuo Nagaoka with one introduced to MJ magazine many years ago. And I added my own idea to it. This method is characterized by not using any goods sold at audio shops or cleaning agents. After completing the care, nothing remains in the sound groove. Once you've cleaned a disc this way, you can use it for about 15 to 20 years without maintenance.

I've forgotten the name of the person who wrote to MJ magazine. I'm sorry.

Please see this PDF for details.
[Vinyl Disc Maintenance]

In this document (PDF), the comparison by listening to two DSD recordings that were recorded before and after the disc cleaning is described. The links below are MP3 files (320kbps) that were converted from the DSD recordings. It may be hard to discriminate between the two in sound quality, but easy about the crackle noise.
Later, the crackle noise was sucessfully removed. For details, please refer to the PDF.
[Before][After]