It’s time to clean it: Clean your faucet aerator approximately every 3 months. The aerator can collect debris, deposits, and rust, affecting the way water flows from your faucet. Remove any debris, deposits, and rust by scrubbing or rinsing the aerator. You can try using warm vinegar and water with a soft toothbrush for scrubbing. A faucet aerator makes the water flow appear to be full while reducing the actual amount of water coming from the faucet, therefore you save water and money on your water bill.