Well, generally speaking, you should not be too worried about your eyes, unless you do not have taken some measures. In common, window cleaner contain some chemicals which can just irritate your eyes. And in that way, your eyes will be irritated, and then red eyes and itchy eyes can be possible. So in my opinion, you need to have some treatments, when the accident occurs. For example, you can just have some pure and cool water over your eyes, especially with soft cloth. And just wipe it frequently. And wash your eyes with water again. Finally, of course, you can have some eye drops to relieve your eyes.