Here’s Why We Think Galaxy Folds Are Failing

If dirt can get into the spine of the Fold, it could also accumulate around those hinges, bringing them in contact with the fallible OLED layer, and that might explain the similarity between the bumps on Bohn and Keller’s review devices. While no media review devices have yet failed due to folding issues, it’s worth noting that if any debris is inside the Fold’s hinge, or underneath the screen protector, pressing on the screen to close it could damage or aggravate the OLED enough to cause failures or problems. Both Bohn and Lionheart said that the Fold’s display would seem to need some kind of “play” or “float” to keep the screen from pressing against the edges of the display when opening or closing.

Source: ifixit.org