LP Cleaning

Hi Guys
Need some advice on cleaning. 
I have a Clearaudio Smart Matrix cleaner. I am using Distilled Water with Spin Clean solution mixed roughly two caps (Large Bottle) to a litre. My TT is a Clearaudio Performence with a Dynavector Karat D17 and the Clearaudio Virtuso V2 both running through an Avid Pellar Phono. 
New records play fine no static or dust noise. Older records play with what seems like a lot of dust noise no matter how well I try and clean. The result is the same with both the Cartridges as well as switching to a combo of a Project TT, Project Phono and Ortofon Cartridge. 
I realise it must be my cleaning efforts. I have seen various videos on line and have tried to do exactly the same. I have also tried to clean with the Clearaudio solution that came with the machine. Can some one please advice how to get rid of the dust or better clean. Should I increase the amount of the Spinclean solution?
Thanks