From Audio Magazine 1984, www.WorldRadioHistory.com https://worldradiohistory.com/Archive-All-Audio/Archive-Audio/80s/Audio-1982-04.pdf
Most of it is for reel to reel but the technology is the same. The part about using TCF (trichlorofluoride) is good, here in the US you can still get NOS TCF cleaner for VHS and audio tape and it works really good. It was banned a few decades ago but there's still stock on ebay.