The windshield stands for the view ahead and how clearly you see where you are going. A clean one is read as clarity; a cracked, fogged or dirty one as worry, confusion or something blocking your outlook.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.