I use GrooveWasher’s cleaning fluid and walnut brush every once in awhile, primarily if it’s a new record or looks physically dirty. I usually just use a carbon fiber brush before I drop the needle every time I put on a side and use a Momila stylus cleaner.
Old turntable was an AT LP60 with whatever it comes with!
Ok, see edit above.
The first thing I’d recommend would be a Spin Clean at bare minimum. Your records are dirty. The Groovewasher is ok for a pre play wipe down, but it doesn’t/can’t deep clean. And dirt plus cleaning fluid pretty much creates mud in the grooves.
If you’d like to put my theory to the test inexpensively, you can send me a problem LP which I’ll clean on my VPI 16.5 and promptly return to you.