Why is my Invisalign tray greenish-yellow?

April 8, 2016
Asked By:km119 in Bloomington, IL

I always take my invisalign out everytime I eat and drink. I also brush my teeth and trays regularly. But, when I took them out today the molars are greenish-yellow. I am on my 7th tray and this has never happened before. Also, is there anyway to take the green away?