Dot i's - Idioms by The Free Dictionary
dot (one's) i's
To be thorough or painstaking in attending to details.
References in periodicals archive
Everybody wants to dot i's
and cross t's and you notice the wine is still sitting there but they've just asked me to be a little careful while they're under great scrutiny and I'm happy to do that.
The failure of the SC Bodner Company to build accessible housing units is more than a failure to cross T's and dot I's