If your sliding door or window doesn't slide smoothly, here are a few things you may check:
1. Bearings - if you have pets, there's a good chance you have pet hair caught in the bearings. If you can , take a tweezer or a needle nose pliers and remove the hair.
2. Bearings - grease escape could also cause the bearings to fail. Carefully re-lube the bearings and your door will start sliding smoothly.
3. Lube - not all lubricants are suitable. Ask wizard screens for a recommendation.
4. Rollers - rollers, typically made from plastic can fail from continuous use. These may need replacement id visual damage is noticeable.
