wordpress menu no longer sticky

  • Answered
http://aireraft.com this menu always stuck when scrolling down for years, until like last few days i noticed it no longer sticks to top on scroll down. Twenty Fourteen theme. any idea what could affect this?

thank you.
Hello TheBoatPeople, Thank you for contacting us about your WordPress menu. I tested the Twenty Fourteen theme on a clean installation of WordPress, and the menu is sticky by default. We are happy to help you troubleshoot further, but will need some additional information. Did you install or update any themes/plugins lately? What were you working on when this started happening? For example what was the last change you made? Since I see non-standard modifications in the source-code, what changes did you make to the Theme? If your problems persist, you want to consider restoring from a backup. If you have any further questions, feel free to post them below. Thank you, John-Paul