Press the ink button for the print head to move to the left, then back to the right into the ink loading position.
Using your hand, physically move the print head to the left and look down into the printer on the far right side. You will see a square piece directly underneath where the print head normally rests. This is the capping station.
Using Simple Green® cleaning solution (glass cleaner will suffice if you do not have any), saturate the capping station. It is recommended to use a syringe or eyedropper for this process. You want the cleaning solution to bubble up on top of the pad but not overflow. Do not wipe the capping station.
Hit the ink button to send the printer back to "home." Let the printer rest in this position for 20 - 30 minutes.
Perform one more head cleaning and print a nozzle check.
If the nozzle check improves, perform one more manual clean.