Ever loaded up the dishwasher, hit ‘start,’ and then later found a warped cutting board or a foggy wine glass? Yeah, we’ve all been there. While dishwashers are lifesavers, not everything is meant to take that high-temperature, high-pressure water ride. So, let’s break down which items should stay far away from the dishwasher—and why.
1. Wooden Utensils, Cutting Boards & Bowls
Why? The combination of heat and water can cause wood to warp, crack, or split over time. If your favorite wooden spoon starts looking like a potato chip, the dishwasher is to blame.
Better Option: Hand wash with mild soap and dry immediately to keep them in top shape.
2. Sharp Knives
Why? High-pressure water dulls the blade over time, making your once razor-sharp knife about as effective as a butter knife. Plus, knives can nick the dishwasher racks.
Better Option: Hand wash and dry immediately to maintain sharpness.
3. Nonstick Cookware
Why? The harsh detergent and high heat can break down the nonstick coating, making your pans less effective (and possibly releasing harmful chemicals).
Better Option: Wash with warm, soapy water and a soft sponge—no abrasive scrubbers!
4. Cast Iron Pans
Why? Water and soap strip away the seasoning (that magical nonstick layer you worked so hard to build), and prolonged moisture can lead to rust.
Better Option: Wipe clean with a damp cloth or use salt and a little oil to scrub away residue.
5. Crystal & Delicate Glassware
Why? The high heat can cause delicate glass to crack, and strong detergents may leave them cloudy or etched.
Better Option: Hand wash with mild soap and warm water, then dry with a soft cloth.
6. Insulated Travel Mugs & Tumblers
Why? Dishwashers can break the vacuum seal, meaning your favorite tumbler won’t keep drinks hot (or cold) anymore.
Better Option: Hand wash with a bottle brush to keep them working properly.
7. Copper & Aluminum Cookware
Why? The dishwasher can dull and discolor copper, while aluminum can react with detergents, leading to unsightly marks.
Better Option: Wash with mild soap and dry immediately to prevent tarnishing.
8. Plastic Items That Aren’t Dishwasher Safe
Why? Some plastics can warp or melt under high heat. Even if they don’t melt, they might release harmful chemicals if they’re not labeled BPA-free.
Better Option: Check the label! If in doubt, hand wash.
9. Anything with Adhesive Labels
Why? The label will peel off and clog your dishwasher’s filter, leading to potential drainage issues.
Better Option: Remove labels before washing or clean by hand.
Final Thoughts
Your dishwasher is a modern marvel, but it’s not invincible. Knowing which items to hand wash will save you money, protect your kitchenware, and keep your dishwasher running smoothly. So, before you toss everything in, give it a second thought—your cookware (and wallet) will thank you!