No need to use Pink noise, just put your favorite tunes with it, enjoy the music, if you are going to eat lunch, leave it playing (any album you want), get back, keep listening, etc. Don't need to keep them playing all night long, just if during the day you are going to keep listening to them, you can keep making them "work".
Actually as a dynamic driver has moving parts with use those parts may expand or change a bit from the original form when new, however the most important part of all is that you with your ears get used to the sound.