We’re glad you chose our stainless-steel cutlery set. Stainless steel is durable, rust-resistant, and easy to care for. Its surface naturally forms a protective passivation layer. In contact with minerals and compounds found in tap water and food—such as magnesium, silicates, and oxygen—this layer can sometimes show a blue or rainbow-like discoloration (so-called interference colors).
Is this harmful?
No. The blue tint is purely cosmetic. It does not affect food safety, service life, or everyday use.
How can I prevent it?
Use dishwasher salt / all-in-one tabs: Ensure your dishwasher has enough regeneration salt (or use tabs with integrated salt) to soften water and reduce mineral deposits.
Rinse off strong residues: Briefly rinse acidic or salty residues (e.g., tomato sauce, mustard, pickling brine) if cutlery won’t be washed immediately.
Avoid mixed-metal contact: Do not leave silver-plated items or reactive metals touching stainless steel during long, wet cycles.
Load correctly: Separate knives/forks/spoons to improve rinse flow; avoid overloading.
Choose a suitable program: Use a standard or glass/care cycle when your water is very hard.
How do I remove the blue staining?
Quick home method: Put a few drops of lemon juice or white vinegar on a soft cloth, wipe the affected areas, then rinse and dry.
For persistent film: Soak briefly in warm water with a splash of vinegar, then clean with mild detergent and a non-abrasive sponge; rinse and dry thoroughly.
Avoid abrasives: Do not use steel wool or harsh scouring powders that may scratch the surface.
When should I contact support?
If discoloration persists after the steps above, or if you notice pitting, rust spots, or unusual surface changes, please contact our customer service with photos so we can help further.