Before you try that.... Instead of a clean, do a carriage maintenance. Once its' to the left shut down the printer and unplug it. (very important) Then take the supplied cleaning solution and soak a lint free towel and place it on the capping station. Slowly bring the heads back and (before you place it back make sure the head height is on high) once you get it on the capping station then put it to low. (make sure the capping station is clean first and you use plenty of cleaning solution let it sit for an hour then repeat. After do a hard clean.
If nothing.... Then might want to try other options.
Works 90% of the time with me.