Thank you for your question. The aerator of the Delta Savile Kitchen 11949-SS-DST faucet is a cache internal threaded part. You would need to use the provided RP52217 wrench, to remove the aerator from the end of your spout. You can then clean or soak the aerator in a 50/50 (vinegar/water) cleaning solution.
Date published: 2018-05-29