If he takes off his mask, his energy will be stronger. Although there is no basis, he really wants to see Kakashi's face under the mask. As far as Kakashi is concerned, it is really helpless to cover this eye with armor. Yakushi Kabuto said Kakashi, you are not You Zhibo. You can't use your eyes like they do. Then Dou ran away in front of Kakashi. Kakashi's eyes were transplanted with soil, but the human body was not compatible with them. Naichi Bo people do things easily, but Kakashi is not. If the main Neichi Bo people want to use it for chakra's eyes, they can stop using it. Kakashi can't even do this, so he can only stop storing the extra chakra.
If it weren't for this reason, Oromoru would buckle Sasuke's eyes and assemble it himself. He wanted a blood wheel eye and used it to the extreme. The best way is to possess Sasuke's human body. Many people say that Kakashi relies too much on the eye of chakra. True or false, Kakashi did use the Eye of the Blood Wheel in the battle against the enemy, but most of Kakashi's use methods tend to help, such as copying the care of others, blinding the enemy with basic illusions, and applying the visual effects of car music to keep up with the human body.
Let's take a look at the application of Yu Zhibo's family to the blood wheel eye, and immediately open their unique professional skills. Uchiha Itachi and Kakashi met for the first time, and Kakashi was quickly defeated. This is not because of Harle's bug expertise. Speaking of fist-clenching, Kakashi has been trained by wizards for many years since he was a child. He is very talented in fitness, and Kakashi has been hiding his eyes in his blood. But he didn't disclose much information to the other party. In Huo Ying, the battle between global warriors is an information war. Whoever knows who has the advantage of the other party's working ability first, Kakashi's eyes will evolve into immortal power, but due to his incompatible mode, the extreme lack of deep blue is the only way.