This unprepossessing little device is something of a giant killer.


Having had my own records cleaned on professional machines by highly regarded specialist Hi-Fi dealers and being underwhelmed by the results, I bought a Knosti Disco-Antistat. On first using this bath cleaner I was staggered by the improvements to sound quality.


As with most things it is not perfect, the fluid can sometimes soak into the record label as it finds its way past the

Knosti clamp. To be fair I do tend to leave the record in the bath longer than would normally be expected, this is in part due to the method that I use to clean records.

Red labels are the worst, they can bleed colour out from the label and back into the cleaning fluid, a tide mark can also be left behind but most record labels are okay.


With bath cleaners (as opposed to vacuum type, which do not necessarily require surfactants)  the surfactant that is needed for bath type cleaning machines encapsulates the dirt and keeps it suspended.  As more records are cleaned the fluid becomes saturated with disolved dirt/grease etc and cleaned records can then be seen to have a residue left on the surface. Although this residue can be seen, my listening tests have found that this is not noticeable to the ear, I can only vouch for my cleaners although other cleaners may also have this effect.

Filter Kit 2 will drastically reduce this residue deposited onto cleaned records - see


With all record cleaning fluids that I have tried (including my own) I dispose of the last 20%, especially If the records being cleaned are in very poor condition, If the records are generally in good condition, then the disposal rate is nearer to 10%.  

Used cleaning fluid can get very saturated and have a slight oily feel due to contamination, proof positive that the fluid is doing its job.                                                                                                                                                               

All or nearly all of HQ3 is used, with 5% or less being disposed of - this is because HQ3 should ONLY be used on new or previously cleaned records, therefore oily saturation/contamination will be low; expect in excess of 90 records cleaned.


The amount of records cleaned will vary according to what type of record cleaning fluid is used and the condition of the records. As a rough guide I would suggest between  50 - 100, I have found it to be in the region of 50 if the records have a high degree of visible dirt etc.


For many years the only way to clean records (other than specialist cleaning by Hi-Fi dealers) was to use cloths, brushes and pads, sometimes soaked with a variety of liquids and nearly always ending up with the contamination from the vinyl being lifted and then deposited back into the grooves. The results from this method of cleaning rarely gave positive results.The Knosti bath is a massive improvement on previous cleaning methods.  






After the normal cleaning rotation, a slight but worthwhile improvement can be made by reversing direction through the brushes.


Turn bath 180 degrees, lift vinyl clear of the brushes, lower vinyl back down and proceed with the rotation.

This method is easily done with the MK1 clamp, but very difficult with the MK2 clamp (with handle).

© copyright MAF Products 2010 - 2021


  This review is of the BATH ONLY

 Any reference to record cleaning fluids (other than my own) are generalized and the results

 for cleaning records will vary, depending on what type of record cleaning fluid is used