New LP’s "clean"? Don’t make me laugh. Oops, too late.
First of all, PVC pellets---from which the LP "puck" is made, the puck then pressed into LP form by a double-plate mold (very much like a waffle iron)---contain trace elements of a chemical included to promote the LP "releasing" from the pressing mold. That chemical is mistakenly thought by some to be applied to either the PVC "puck" or to the plates of the mold, but that is incorrect. The chemical is, as I said, part of the PVC compound, the chemical rising to the surface of the disc as it is heated in the mold. That chemical can be found in the groove (an LP side has not grooves, but one long continuous groove), and should---for best sound---be removed.
And then there is the fact that, as tomic601 stated, LP pressing plants are hardly clean rooms. In one All Things Must Pass 50th Anniversary unboxing on YouTube, the video poster removed one LP from it’s sleeve, and I couldn’t believe the amount of dust and paper debris that was clearly visible on the LP surface. Can you imagine what is the the LP’s two grooves?!
Fortunately for us, there are great LP cleaners now available, and at a very reasonable cost (under $500, for either a vacuum machine or an ultrasonic. Both is even better. If you have more than a few hundred records, you really should get one or both. IMO.) The Hunt, Decca, and Audioquest brushes are okay for dusting an already deep-cleaned LP (I have all three), but are not deep-cleaners. Ignore the above if you so choose, but it’s fact.
