When GitHub doesn’t recognize changes after modifying files, it may be due to cached files or unchanged timestamps. To force recognition, try ‘touch filename’ in the command line, which updates the file’s modification time. Alternatively, renaming the file or moving it temporarily can prompt Git to detect the update. If the issue persists, check for line-ending inconsistencies (LF vs. CRLF) as they may affect detection. Running `git add -A` and `git commit` also ensures all modifications are staged and recognized. Updating these elements usually refreshes Git’s file tracking, ensuring that GitHub reflects the most recent changes.