Go over/through something with a fine-tooth/fine-toothed comb spoken language verb phrase
Used to describe the act of scrutinizing something thoroughly.
My job is to go through these documents with a fine-tooth comb.
It's paying to go through the contract's terms with a fine-tooth comb before we sign it.
The police are going over CCTV with a fine-tooth comb to find out the evidence convicting him.
Make sure you go over the essay with a fine-tooth comb before handing in it.
After thinking carefully about something for quite some time
From the beginning to the end.
To look beyond what is apparent
To explore or investigate every possible means
Do something thoroughly, excellently, or perfectly