A patio door should be easy to open, moving with just a simple touch. If your door does not open smoothly, there are a few possible reasons why. First, your rollers may just be improperly adjusted. This can easily be fixed by turning the roller’s adjustment screw. In worse cases however, the rollers might be clogged with dirt and debris or may simply be worn down from age. Continually using a patio door in such a state can potentially lead to damage to the track, or even to the handle itself snapping off. Make sure to routinely clean and lubricate your track and rollers.