Update on my vacuumless cleaning with the Knosti toy. Art du Son has arrived, also Last and Stylast.
1. Yes, Art du Son doesn't gunk up the stylus as much as the Knosti fluid.
2. Art du Son somehow seems to make it trickier to unscrew the plastic Knosti hubs; I ended up scratching another LP. Also, the Art du Son made the ink run on a Philips red label, so the label is stained (not a big worry) and several LPs got washed in a weak solution of red dye.
3. Some of the LPs I cleaned are markedly improved. E.g. a repeating crunch disappeared that I'd previously assumed was vinyl damage.
4. Most of the LPs aren't markedly improved. Whether these would be transformed by expensive vacuum cleaning I don't know; I must get a few professionally cleaned, to find out. With all due respect to Lynn S and others, I suspect that a lot of the remaining noise (e.g. overall ââ'¬Å"grittinessââ'¬Â) is imperfection to the grooves, either from the original pressings or from years of wear.
5. I'm most disappointed by a lack of improvement in sustained quiet stretches of classical music, e.g. the beginning of my ââ'¬Å"Das Rheingoldââ'¬Â LP is still crackly after several cleanings (not to mention the recurrent vinyl bump that's irritated me since I first played it in 1978), and the fading chorus at the end of my ââ'¬Å"Planets Suiteââ'¬Â LP is a trial of gritty distortion that not even digitizing and click-removal can fix. Half of me thinks it's amazing that one can get still get so much music out of these old lumps of plastic; the other half is reminded just how much I used to wish someone would hurry up and invent something better than LPs.
For anyone still awake, new questions:
* How weak can I dilute the Art du Son, and how many LPs can I wash in one Knosti-ful? If I dilute it 40:1, clean only 7 LPs (the capacity of the Knosti drying rack, then pour it away, that's going to work out more expensive than having my LPs commercially cleaned at £2 a time.
* Stylus care. Last and Stylast seem to do some good. They also came with a with black round-headed brush which is very good at removing fluff, but which isn't mentioned in the Last instructions. If I use this brush with care, is there any reason not to use it frequently? E.g. before each LP?