If your sliding glass doors are refusing to slide open, the door mechanics are due for a good cleaning and lubrication. While the typical response to a chunky door track is to use a petroleum-based solvent — like WD-40 — a simple bar of soap can do the exact same thing because it acts like a lubricant. This is one of the many reasons why it’s great to have bar soap hanging around your home. In fact, some greases and solvents are actually considered to be dirt collectors, which is obviously what you want to avoid.