I can't help but think that the RCM is an advantage, just I can't help but think the those Pledge cloths are charged with stuff that is best kept off your records. It's possible that the degradation that you hear after vacuuming is due to the static that is generated from the vacuuming process. If you use the RCM to the point of utter dryness the disc will come off staticky and quite attractive to dust in the air. I find a destaticing device such as Mapleshade's Ionocalst or Walker Audio's Talisman invaluable at this point just prior to playing. Alternatively, there are those who swear by playing their records wet, which of course precludes static, although your water better be ultra-pure, an important advantage however you clean.
Dealer disclosure.
Dealer disclosure.