I'm a project manager in a small team of developers (consisting 3 team leaders and 10 programmers)

We're currently trying to enforce clean code for our team , we're having small frequent seminars discussing uncle bob's clean code book.

Long story short, we are trying to make sure that clean code are well implemented in our team. to do that we're asking our team leaders to review their team's committed code daily and take note whenever a piece of code aren't clean enough. By using this method, all the team leaders are completely overwhelmed by the amount of code that they have to review everyday and cannot review the codes in detailed manner.

is there any better method to review codes to make sure they are clean? we want to make clean code to become habit as soon as possible.

Thank you