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After all carpet sections have been laid and secured, perform a final inspection of the entire staircase. Use your utility knife to meticulously trim any remaining excess carpet, especially where the stairs meet the baseboards, walls, or the top landing. Ensure all carpet edges are perfectly flush and clean. Press down on all carpet surfaces to check for any loose spots or areas where the adhesive may not have fully bonded, and re-staple if necessary. The goal is a seamless, tight, and professional-looking carpet installation.