Hi Shana! Are you taping your eyes at night with sensitive first aid tape or covering them with a mask or cotton bandana tied around your head? Doing this really helps keep the eyes more moist at night.
Also, my local optometrist had a generic brand of eye lubricant that was only a fraction of the cost. Over-the-counter stuff is about 3 times as much! Definitely worth checking in to.
Good luck, Debby