FWIW, I am happy with a Spin Clean. For a couple of years, I could not get past the Canadian price of $80 for a piece of plastic with a couple of roller and brushes. But I connected with a guy from Maryland on the AK site who shipped me his (to Sumas WA) with nearly a full bottle of fluid for $35.
The first cleaning project were about four hundred 45's and the difference was (hate to be cliche) amazing! I partied with these records in the 60's & 70's and a lot were doused with beer and who knows what else plus many wound up on the floor and got danced and walked on. True that scratches aren't fixed but they came up pretty good with a lot less surface noise than they used to have. I also cleaned about three hundred 78's. I was assured by Spin Clean themselves that their fluid would not harm or react with what 78 records are made from. Unfortunately, the one 78 I was really keen to clean up (All American Boy by Bill Parson aka Bobby Bare) did not really benefit. Guess it was just plain old worn out.
I have about 2500 LP's and cleaned any that were played more than 3 or 4 times which was most of them. I would do about twenty at a time, running sixty through one trough of fluid per night. That may have been too many and I will scale that back to forty or fifty in furure. To save time, I used a wooden dish rack to air dry the records for a few hours. Even though it's more work, one thing I will advise is that when using s Spin Clean, use the drying cloths right away after shaking excess of the record. Get as much of the residual water off as possible. I've noticed a "residue" pattern on those that I just left to air dry but it doesn't seem to create any noise.
Along the way, I tried searching for what was in that old Discwasher fluid. I found what I believe to be a something akin to the original and made a liter of it. I'll be trying that in the Spin Clean when the last $20 bottle of their fluid runs out.