TMH wrote:

I use the container cap for the wash detergent and pour the conditioner
into the dispenser tray thingy.

Washes fine, conditioner clearly gets into machine, but after the wash
the conditioner compartment is full of water.

The conditioner compartment has a rounded cap over a tube, which forms a
syphon, remove the cap and soak it in hot water to de-gunge it occasionally.