What is the best way to clean Vinyl?

When I had found the LAST system it couldn’t be shipped in the US. It wasn’t til the late 90’s I was able to purchase and receive it (shipped).  It was their record preservative that had caught my eye. The statement of the temperatures hit with stylus dragging around the vinyl and the ability of this preservative to lower the temperatures considerably.  I use their cleaning solution and brush/ applicator as well. It has kept the vinyl in good shape. I am using a Technics 1200 and grado cartridge.  Which when I got it in 92 sounded better than all the cds in our collection and still does. 
I just hadn’t seen LAST mentioned, and didn’t know if anyone else used it. It is a manual method. I see they make a cleaning solution for RCM units also, never used one though. 

@fleschler

Thanks for your remarks. I just can’t imagine. I guess, while misic has been a really central theme of my life… and at its core… the music I collected… I can’t conceive of the numbers you are talking about.

But then, I have travelled extensively,.. and spent time in between trips getting music… for instance, onto cassette tapes (Dolby C) to go on my three weeks trips every month to isolated parts of the SW US each month as a Geologist. I took about 144 albums with me in two brief cases. I listened to music about eight hours a day. I did this for years.

Then I became an executive and traveled globally for decades… with my music, CDs, battery powered head amps, ear speakers, headphones… you name it. In planes, across Europe… around the world… living in Scotland, China, Japan, Mexico, and across America for weeks and months at a time. I had at one point 4,000 albums (1/2 Cd). Music has been the central theme of my life. So, let me say, your story is amazing!

I've probably got over 100 Older LPs.

What should I buy with a $500 limit? 

TIA

Also about 25 new which I've been using exclusively due to my fear of damaging the needle.

What should I do?

You have two choices with a $500 limit. If you don't mind the effort, a SpinClean and a long read of Neil Antin's pamphlet* will be one way. The second is a vacuum machine that might need to be used to fit in the limit. It will get you 80% of the way to the best any of us can do. An ultrasonic cleaner gets you the rest of the way to what is currently achievable.

This is worthwhile, and likely should come before more esoteric upgrades of cartridge or phono stage in my view. It not only can make an LP as quiet as a CD in many cases, but it will prolong the life of your stylus remarkably.

*the PDF is at this link: