Learn the exact step-by-step process to start and complete your dream bathroom makeover in 10 days plus exclusive video training! Does your sliding glass door open slowly? Mine was tough to move and our young daughters could barely budge it. Standard sliding glass doors all have tracks. The track acts as a guide for the door and also allows roller wheels to help the sliding shower door bottom guide run smoothly. Over time the sliding glass door track accumulates dirt and grime.