It's recommended to place liquid on CAPING STATION ( It's small spongy rectangles that cartridges sit on when printer is not printing ..right side ).
DO NOT POKE WITH SYRINGE SPONGES , just put few drops on top and slide print head back to resting position. Let bottom of printhead soak in it for at least few hours.
For access turn machine on and when you hear print head is moving remove power cord quickly... you'll be able to slide print head left manually.