I'd like commenting again. Lloyd possibly was conducting some curious tests that day, and I would assume that if the Prelude Cleaning System is so good, as everyone claims it is, one wouldn't find a need to resort to steam.
Not in any way berating Prelude, because if what I was using currently became no longer available, the Prelude System would be the one I would most likely turn to-consider. Only possibly dislike I might find with the products, is the need to pre-mix batches of the Enzyme Cleaner.
I'm not here to hype any particular product, but with the products I've been using, I have found no need to resort to the Steamers. One might argue, saying, "well that's because my system isn't high quality-resolving enough to hear the differences". I believe it certainly is, and I don't think one will absolutely need to spring $40K on a Table to clearly know without a doubt, the records are perfectly clean.
Although the ZYX Airy 3X Cartridge is not what I call a "high resolution click+pop finder", as it is a cartridge that plays very quiet in the groove.
I've seen how steam "tacos' records, and there's enough of this on youtube to see such, as when the steam is applied, the record warps crazily. Yes, that goes away once the steamer is pulled away, and the record is left to cool, but to what degree it then returns to its fully original state before such an assault I'm sure is not 100%.
Since the dawn of time with vinyl, it always has been a no no leaving vinyl in a hot car, etc. And that's one good argument as to why I would not wish to create a self made enviornment of hea destruction for my treasured vinyl.
I believe one day, someone will show visually, the effects at the miscroscopic level, before, and after, the evidence of what steam (I prefer to call it hot water) does to the groove.
I'm a firm believer, that if the cleaners that are used are properly designed, in that they do the job they supposed to do, which is detach the contaminants that are found in the groove, and place them into the aqueous solution, so that the vacuum can come along and remove them, then the job is essentially correctly accomplished.
As well, that no residues are left behind due to an inefficient vacuum system, or that the vinyl was damaged by the specific components of a cleaner system. That any residues left behind in the groove, are just another type of contaminant left behind for the Stylus, (and the Ear)
I know there's people here who have a better knack of explaining the sciences involved, and putting them to type better than I. I don't exactly consider myself a William Shakespeare, or someone like Justin_Time when it comes to writing.
Again, do use what you feel is best for you. I am well aware how such topics have controversy about methods-cleaners.
I will lastly say, that common sense causes me to believe that a $500 RCM with the best cleaners, and proper techniques will give head and shoulders better results versus an RCM costing 10 times the price but with inefficient cleaners, rinses, and/or poor technique. Mark