I'm sort of hesitant to post this, but having mostly 'pre-loved or -hated' LPs, the only way to get them listenable is by the "cold glue method" (can Google it too), this followed by the quite primitive 'Spin Clean' and using their fluid, just to take care of the static charge that follows the peeling off of the dried cold glue film.
It is the the best and most effective method I found out to date, and having by now used it hundreds of times.
I have tried a Nitty Gritty, a very beautiful, almost 'sexy' German made 'Hannel' with roller brushes and powerful suction.
Nothing works as well as the 'cold glue method' - and it is *quite* to boot!
The trick is, to get the best cold glue for the job, definately none of that hyper-aggressive stuff for professional bonding of high resin contend exotic timber! This will etch the vinyl and be VERY hard to peel off once set!!!
Also, no messing by spreading with your fingers as once shown on some Michael Fremmer video!!!
One needs to learn the use of a softish silicone food spatula to evenly spread the cold glue on a 45rpm spinning tt (for all 33 rpm LPs), and learn to dose the glue application by best, a tiny nossle using the least workable amount, on a sufficiently torquey turntable. This with a record centre clamp to prevent the record's slipping on the turn table platter.
This may sound lengthy but after a short learning time it's a pretty swift and NON-MESSY! process.
Lastly, this process can be repeated many times with NO damage to the vinyl, and usually brings additional improvements for extremely difficult cases of age old baked in dirt particles.
Nothing else I ever tried worked at all as well.
Seriously! 👍
M. 🇿🇦