I've been using a De Stat Gun and Discwasher for over 45 years. I borrowed a friends UC and cleaned my 1600 pieces of vinyl. About 500 are from other peoples collections and most were filthy even after the Discwasher. The UC cleaned most of those up completely. The rest of my collection is new vinyl I have purchase for the last 50 years or so. They have all been de stated and then Discwasher before each play. They showed little to no gain from UC.
My cleaning solution is now 1 qt. distilled water and 25 ml pure Isopropyl Alcohol.