Grab a loupe too, sometimes the cracks are too fine to see otherwise. @viola_ward gets it, that save is a great feeling.

My old art teacher swore by a 30-minute vinegar soak for new fabrics. I tried it once with some cheap indigo denim, and honestly, it just made my whole kitchen smell like pickles with no real change. These days I just cut a tiny corner swatch and torture it with hot water and soap first.

My buddy at the machine shop uses that stuff on worn lathe ways. It sets up in twenty minutes and holds a crazy tight tolerance. Saved him a ton on a full remanufacture.