If you want fool proof, theni take it apart and clean it manually.. the spray on method doesn't do anything but "lessen" the buildup.. the stuff is on there WAY to much to be taken off simply by the booster method. There is a thread in Pics and Vids about a weeken cleaning that states the exact thing. he did the booster method and THEN took it apart to find it looking like he hadn't touched it.
There is a how-to I wrote in the Duratec Maintenance forum, stickied at the top. If you can read English, and follow SIMPLE directions, you can do this.
Ray
