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Black or gray marks on dishes

Black or gray marks on dishes — Aluminum rubbing

Teka · Dishwashers

What does Black or gray marks on dishes mean?

Dark marks on dishes are often caused by aluminum utensils or cookware rubbing against other items during the wash cycle, leaving metallic scuffs.

Common Causes

  • Aluminum utensils have rubbed against dishes.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Use a mild abrasive cleaner to eliminate these marks from your dishes.

  2. 2

    Rearrange items in the Dishwasher to ensure aluminum pieces do not rub against dishes.

  3. 3

    Check that dishes are loaded properly according to the loading instructions in the manual.

  4. 4

    Avoid placing aluminum items directly next to other dishes if marks are a recurring issue.

Browse all codes in this manual (39)
Verified technical data. Last updated: April 2026

Related Faults

10 beeps every 30s10 beeps every thirty seconds — Dishwasher door opened during cycleBuzzer 8 secondsBuzzer sounds for 8 seconds — Wash cycle finishedBuzzer one short signalBuzzer one short warning signal — Program reset successful
Source: Teka Dishwashers
Open Manual (Page 28)Search more codes in this manual