Moth Mark2
I have a Moth Mark 2 which does the forwards and backwards vacuum cleaning. I'm eternally grateful to the chap who sold it to me 2nd hand for the princely sum of ?150. I use the standard home-made cleaning agent formula of 4 parts purified water/ 1 part isopropanyl alcohol/ a couple of drops of photographic wetting agent as recommended by Moth.
I haven't tried products like L'Art Du Son and might perhaps take some convincing at that price, although exactly how I'd be convinced is difficult to say. A strict A/B would of course require 2 of the same LP from the same issue in an identical state of filth!
Does record cleaning work? A resounding yes in most cases, but also a qualifying no. Obviously a visibly scratched record remains scratched and the scratch will almost always sound after cleaning. LPs played with worn or damaged styli can also be invisibly but permanently damaged. LPs made from grungy recycled vinyl from the mid-70's and into the 80s won't have their surface noise removed by cleaning. Some LPs remain beyond redemption for no obvious reason...
Sadly, more than a few of my LPs haven't been played much from new and were stored under a window-bench against a wall in a bay with a history of damp-problems. Consquence? The release agent remained on the vinyl, wasn't removed by regular prior brushing, then playing and under those damp conditions turned to visible and highly audible mould. Mostly the Moth has been able to restore them to as new, but in some cases not.
The good news of course is a cleaner like the Moth is indispensable to the active analogue addict. I regularly go to record-fairs - usually the VPI ones at Kensington Olympia - and it is really ridiculous what you can at 3 or 4 for a fiver. And then the dealers start chopping their prices towards the end of the day... poor sods but then I don't suppose that many nowadays are full-time pros. Anyway - even at that price I won't risk bad-looking vinyl. But I do tend to come back with bagfulls on the basis that if even a 2 or 3 don't respond, it's no great loss... and in any case there's my mate with similar tastes who still has a turntable but doesn't get hifi... or failing that the charity shop.
Hope I've not rambled on for too long... Must give the Nottingham Analogue Hyperspace a shove to make it spin.
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