Looking after you wipe

I read a post on here a few months back and a surprising amount of people said they don’t look at the TP after they wipe. I’m still trying to wrap my head around how you know when you’re clean

Like I’ll wipe and FEEL clean but still see streaks, HOW?! Where’d all these people go?

Edit: I definitely look. I’m just wondering what monsters wipe and don’t check if they’re done wiping

New edit:

A lot of people just keep spouting bidet. Idc, I want to find the monsters that wipe without looking. I need answers here, if you don’t look how do you know you’re good?!