I don't clean until accuracy falls off and like others, I'm not sold on a hospital sterile barrel/clean. That said Cortina used CLR a bit but seems to have stopped.
Here's his latest deal I could find on it. First 3 mins he goes over what he's using - rest of the vid is a how to so to speak.
Sounds a lot like "You should not use it", "I'm still going to, I'm just not going to tell anyone".
A true sportsman counts his achievements in proportion to the effort involved and fairness of the sport. - S. Pope