5Aluminum Some darkening or spotting possible.Remove by scouring with soap-filledsteel wool pads.If in doubt, check with china/stoneware manufacturer or test washone piece daily for a least a month.Compare with rest of set.Some coloredanodized aluminumcan fade.GlassIronNon-dishware itemssuch as filters, etc.Load securely to prevent movement.Check crystal manufacturer'sinstructions.YesExceptions Special InstructionsUsually SafeMaterialChina/Stoneware Yes Antique, metaltrimmed, hand-painted or over-the-glaze patterns fade.Gold leaf will discolor.Antique, metal-trimmed or hand-painted patterns willfade. Gold leaf willdiscolor.Milk glass may yellow.Iron will rust.Crystal YesYesNoNo Damage to dishwasher anddiscoloration or staining ofdishwasher may result.After washing, wipe non-stick coatingwith vegetable oil to keep coatingfrom losing non-stick quality.YesNon-stick coatingsPewterPlasticsNo Pewter tarnishesYes If plastic does not say dishwashersafe, test one piece before washingentire set.Rinse if not washing immediately.Salty or acid foods can stain if left on.Rinse if not washing immediately.Salty or acid foods can stain if left on.Powder detergent can cause blackspots. Avoid placing under detergentdispenser.Stainless steel YesSterling silverand silver plateYes Contact with stainlesssteel can damagesilver.Washing with coppercan leave a brownfilm on silver.Tin can rust.Wood can warp,crack or lose its finish.TinWoodNoNoDetermining Dishwasher-safe Items