Thank you for your question. Unfortunately, we do not manufacture a key/tool for removing the aerator of the Delta Ara Lavatory 567LF-MPU faucet. The aerator is not designed to be removed from the spout as any debris large enough to get caught will be trapped by the flow restrictor first. The flow restrictor is inside the valve below the cartridge and can be removed with a pair of needle nose pliers. The How-To video linked below will show you how to remove the cartridge.
The bottom of the aerator can be cleaned by soaking it using a cloth saturated with a 50/50 white vinegar and water solution.
Date published: 2018-12-31