We've all been there: that moment when you wake up in the morning to find a little bit of crust in your eyes. This is totally a regular occurrence, but what exactly causes it? It's all down to those tiny {tears{, or https://mattieqgab463375.illawiki.com/2332383/the_crusty_gunk_you_wake_up_with_eye_crust_what_s_going_on