We've noticed that after the machine finishes its wash the draw is still full of conditioner and water; we have cleaned the drawer and tested it outside the machine.
If filled with water it will often drain away;but once placed back in the machine with conditioner in the drawer, we have the same problem, the drawer is holding some water in the conditioner section and hasn't run into the washing machine.

Michael Bates, September 2011

holes above the conditioner compartment blocked or remove the blue bit from the draw and clean the holes out underneath or low water pressure or reduce/dilute the conditioner you use

ck, September 2011