. . . after all the years of making billions of these things, why haven’t the manufacturers solved the problem?
Dead batteries. A fact of life. Replace it. A dead battery that ruins your device is far more insidious.
Even the modern alkalines will leak. I seem to remember that EverReady used to claim that their battery was leak-proof but that was one of the most outrageous false claims in advertising history.
So what’s the SD?