Face it, record cleaning is just a PITA. The new ultrasonics make life easier, but I still pre-clean used records. I think I may have lucked out on an early copy of Love it to Death- now, probably have 7 or 8 copies. This one was dusty, in the original sleeve, and looked like it hadn't been touched in years, likely never 'cleaned' and it is an early pressing, albeit a green label, not the pink 'Straight' label. So, I spent a considerable amount of time on that one. The proof will be when I crank it up.
By contrast, I just got one of those 82 red mono Beatles records to check out, and that one, just popped it into the ultrasonic without a pre-clean.
I'm also going to try the AIVS No. 15 as a pre-clean for the nasty used records.
Like I said, PITA.