To remove the try there is a little level flap at the back right hand side of the soap drawer - You gently push it whilst gently pulling the tray and it slides out (I used to yank it before I found the level!)
You then take the part out of the softner compartment, back left, it should lift up and off then clean it of all the gunk - When you put it back together fill it with water and ensure it drains out by itself (via the syphon method - IE when full it then drains from the bottom of the compartment and draws all softner with it)
Angus
Angus, January 2008