anybody having trouble with cruse control. on 2009 Hyundai Sonata

I can set speed but i can not add or decrease speed with the + or -. Have to break or speed up then hit set to fix speed. Occurs everytime i use curse control.

Asked by for the 2009 Hyundai Sonata
Is this not still under warentee from Hyundia? Hyundai as a car manufacturer put a lot of free technical information and workshop manuals on line for Hyundai owners. Check out lots of great information.
Thanks will take a look,