Fall through the cracks

From Fresh Dictionary

English

Verb

to fall through the cracks

1. ((idiomatic{{#if:|, {{{2}}}{{#if:|, {{{3}}}{{#if:|, {{{4}}}{{#if:|, {{{5}}}{{#if:|, {{{6}}}{{#if:|, {{{7}}}{{#if:|, {{{8}}}{{#if:|, {{{9}}}}}}}}}}}}}}}}}}})) to be missed; to escape the necessary notice or attention

   Complete every item, and make sure nothing falls through the cracks.