**8 Things You Absolutely Should Not Put in a Dishwasher **(And Why)

2. Delicate Crystal and Fine China
If you own exquisite crystal stemware or fine china, it deserves the royal treatment.
The high-pressure water jets can cause fragile glass to chip or shatter against other dishes. Harsh detergents and intense heat can permanently etch the surface of crystal, leaving it looking cloudy no matter how much you polish it. Additionally, any delicate gold or silver trim will likely fade, peel, or wash away entirely.
How to care for them: Line a plastic basin with a towel to prevent slipping, and wash the pieces gently with mild dish soap and lukewarm water. Rinse thoroughly and let them air dry on a rack, or dry them carefully with a lint-free cloth. Never stack heavy items on top of delicate pieces.
3. Cast Iron Cookware
Cast iron skillets are the undisputed workhorses of the kitchen, but they absolutely despise the dishwasher.
The harsh detergents and high heat will completely strip away the polymerized oil layer—known as the seasoning—that gives cast iron its natural non-stick properties. Without this protective barrier, the iron will rust rapidly when exposed to moisture and air. Over time, repeated dishwasher cycles will severely degrade the iron’s surface.
How to care for them: Hand wash with hot water and a stiff brush (you rarely need soap). Dry the pan completely on the stove over low heat, and rub it lightly with oil after each wash to maintain the non-stick surface. Never soak cast iron for long periods.