Phone scanning apps like Google Lens, Adobe Scan, and Microsoft Lens have gotten astonishingly good at curvature correction, shadow removal, and text sharpening. But the single biggest variable in output quality is still the physical setup you provide. In this episode, we break down the three hidden failure modes of AI document scanning—background contrast, curvature correction, and glare—and reveal the cheap household items that fix them. From dark craft paper to neodymium magnets, these simple tricks can mean the difference between a clean scan and a rejected passport photo. As live document scanning becomes mandatory for banking, travel, and identity verification, understanding these limitations isn't a hobby—it's infrastructure for modern life.