Dear Stewart,
We are glad to hear that your installation was a success. If soap and water does not remove the fingerprints, you may use a mild detergent. We recommend that you test any cleaner in a non-conspicuous area to ensure it does not cause any damage. If neither of these work, Please feel free to reach out to a Specialist. They can be reached at 800-964-4850 Monday - Friday 9am-6pm EST, or via email at customersolutions@deltashowerdoors.com. - Best, Delta Shower Doors Team