As far as secrets go, I don't think I have any.
There's tips aplenty.
1. Get yourself some nice (and by nice I mean... I dunno any kind will do) microfiber towels. The towels that come with the Spin Clean are pretty much gauze and get saturated very quickly.
2. The instructions will tell you to fill the basin with water either to the bottom of the rollers or midway up (I don't have my instruction sheet handy). If you listen to that, the innermost grooves on your records wont be submerged. I think they still get clean but my method is to fill it to the top of the brushes and then I add just a touch more cleaning fluid to compensate for the additional water.
3. Get a clean dish rack that will support records well for final air-drying before putting them away. Then work out a system for how you want to go about cleaning, towel drying, then air drying them.
4. Don't leave the brushes sitting in the water/cleaning fluid mixture for extended periods of time, there are many reports of the brushes rotting and/or getting mouldy.
5. My final tip (for now), get yourself some good inner sleeves if you don't already have them. There's nothing sadder than giving a record a good cleaning and then putting it in it's old, dirty jacket.
The Spin Clean is a good product, I'm happy I got one. Hope this helped.
Jack