How do I remove the detergent dispenser. AWG995?

I want to remove and clean the detergent dispenser drawer on my Whirlpool AWG995 washer/drier.
The instruction manual says :
" - Pull out the drawer as far as possible
- Remove the drawer "
How do you release the drawer in order to remove it ???

Replacing the drawer says :
" - First locate the rib at the upper rear right hand corner into the slot behind the control panel.
- Position the drawer so that it slides into the left hand slot and give a push. The drawer should now slide in easily. "

Maybe I could get the drawer back in if I knew how to remove it in the first place!!!