I noticed certain artists not appearing in daily miixes. I made a playlist of those artists. Listening a lot to this list should solve the problem. As the daily mixes adapt to your listening.  But it did not not solve it after more than a month of listening. 

My number one artist is in none of my daily mixes. I now only listen to artists not in my daily mix. My top 20/50 is filled with artists not appearing in the daily mix. Pretty soon I will have a top ten filled with artists not in the daily mix. This really puzzles me. Anyone know how the algoritm could be so off.

I have been doing this for more than a month. Only listening to songs not in my daily mixes. My playlist of artists not in the daily mix very slowly gets smaller. Every ten days or so the daily mix get a big refresh. Last refresh two artists appeared. But it seems that some artists just dont show up in the daily mixes.