I don't think the players even want to pass to him anymore. Watch a few of the last games, he is just never ready to receive a pass, reacts so slow and never chases a lost ball, even if the player is still close to him. Not sure why the media aren't picking up on it, if it was Salad or Penandez they would certainly be talking.
Strikers do have droughts, it's well known, but I'm always saying it's his attitude, like he isn't enjoying his football at the moment and not trying hard enough.