Thank you guys for the quick reply. I called The Lowe's Aqua-source number -they said they did not show a separate aerator - so it probably is not serviceable. I may go ahead and attempt pulling it out with a hook or needle nose. I searched on the second picture of the bottom of the spout. A similar Kohler faucet appeared, One owners said removing that piece it did not help. One guy has a video where he solved the sudden no flow problem by removing the low flow restrictor. It was clogged. Perhaps that is causing my problem. Thanks again for the help,