The key is to educate and inspire him ideologically. If he doesn't have this consciousness, he won't listen to you no matter how you ask him. So:

First of all, let him set up the determination to get rid of these problems in his mind. He is not young. He should be a serious and responsible person. Dad will talk to him and let his son review by himself.

Secondly, we should not rush into it. It takes time to form a habit and time to change it. He needs at least 2 1 day.

Finally, as a parent, he may not care so much, let himself regret this forgetfulness, and let himself deeply realize the necessity of making changes.