The freezer air (especially if door seals are worn)
When new ice forms, it traps these tiny particles—resulting in gray, cloudy, or speckled cubes.
Good news: This isn’t usually harmful—but it can affect taste and smell.2. Charcoal Sediment from Your Water Filter
Most modern fridges use carbon (charcoal) water filters to remove impurities. But:
New filters often release fine black carbon dust during first use
Old or damaged filters can shed charcoal particles into the water line
This sediment flows into the ice maker, creating gray or black-flecked ice.
Note: Carbon is non-toxic—but it’s unpleasant in drinks.
How to Fix Gray Ice Cubes — Step by Step
