J.W.
My oldest had pink eye. We didn't clean anything and no one caught it. The biggest thing was making sure he washed his hands and did so if he touched his eyes.
I believe it needs moisture to stay contagious.
What did your doctor say?
After reading what Sunshine posted, one thing you should be careful of is external infection. What I mean is your daughter got it somewhere, most likely someone who didn't want to keep their child home. That same person was infection others so if you come in contact with them it comes right home again. The son I talked about, pink eye went around his class for over a month. They just kept sending their kids to school while they were still contagious.