Do you have days where you get to 3pm and your brain is fried? Too much code, too many meetings and too many discussions? I’ve found a good thing to do during that time. That is the best time for reviewing code readibility.
I’ve found that at 3pm, I have new insights into variable naming, code structure and function decomposition.
If your code makes sense even when you are braindead, it may be a indicator of overall code maintainability.
Note: I am referring here to reviewing readibility. I cannot promise that you will have any intellectual ability left in your day to actually rewrite the code. That is entirely up to you.