go over/through something with a fine-tooth comb
US /ɡoʊ ˈoʊvər/θruː ˈsʌmˌθɪŋ wɪð ə faɪn-tuːθ koʊm/
UK /ɡoʊ ˈoʊvər/θruː ˈsʌmˌθɪŋ wɪð ə faɪn-tuːθ koʊm/
1.
to examine something very carefully, looking for mistakes or problems
:
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The auditors will go over the accounts with a fine-tooth comb.
•
We need to go through the contract with a fine-tooth comb before signing it.