Well perhaps there is a lot of experience out there saying WD40 is good for records, but my instant reaction is that although it might initially reduce stylus drag and surface noise, that is not the problem you are really trying to solve, and it may disolve some dirt and allow it to be removed, but surely you end up with a lightly oiled record that will be bugger to get degreased and attract much more dirt and ultimately make things worse? Short term gain for long term pain? Dunno, maybe others out there can comment on the wonders of WD40 and vinyl from a position of experience. Feels all wrong to me.
As I mentioned before, you will get close to the same cleaning with a KAB-EV1
https://www.kabusa.com/frameset.htm?/ev1.htm as any other vacuum slot rcm (at US$169 split between you is not a huge outlay even after adding P&P and import duty to the UK). It is a Nitty Gritty vacuum slot but even more manual and requires you to own a vacuum cleaner
as it has neither motor nor vacuum built in. Combine that with tried and tested IPA (or L'Art du son) suitably diluted with distilled water and you have a cheapo tried and tested record cleaning set up, add some new anti static sleeves and sleep easy.
If that is too manual, you can always buy futher up the vacuum rcm tree, but the top of the tree is an order of magnitude and perhaps and an order of magnitude and several multiples more money for automation, quicker, quieter operation and arguably slightly better cleaning. Fine if you have the money and not the time/inclination and/or a very large record collection to clean (
@Tony L must clean plenty and it is his business so a good candiate for a top machine) but I am not sure that is needed from a purely cleaning perspective. Great to see so many suggestions for four figure machines in this thread
https://loricraftaudio.co.uk/ https://www.analogueseduction.net/record-cleaning-machines/discoveryoneredux.html as it shows people really care and have large record collections and that makes me happy but I would suggest you don't need to start there, we all need a dream. Of course there is every possible and imaginable level between, just trying to show the range possible on vacuum rcm ... others here are better placed to talk about the top end vacuum rcm and ultrasonic cleaners.