Standard household white distilled vinegar (containing approximately 5% acetic acid) is the absolute best and safest vinegar for cleaning and descaling faucet aerators. It provides the ideal balance of mild acidity needed to dissolve stubborn calcium and lime mineral crust without being harsh enough to damage plastic internal components, rubber washers, or delicate metal finishes. Verification: Submerge the aerator parts in the white vinegar bath and observe bubbling as the calcium dissolves.
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