Well, generally speaking, it can be because of the dry contacts, especially when you use daily disposable contact lenses. It could make your eyes been drying out because they're so thin. So there are some tips you can use to take them out. For example, you can pull your eye right open , and hold it open by holding your top lashes with your other hand, then carefully move the lenses off your iris. But you should remember that the iris should not be touched, so you need pinch lenses directly off them stings, until you get used to it. Also, you can have a warm drink and while just constantly blink, so that it can increase the amount of moisture in your eye. And then just take them off. Besides, you can also drop some eye drops. But you should pay attention to have some eye infection when taking them off.