Fujifilm F470 Finepix buttons not working, camera works

Good morning!

The buttons on the back of my awesome Fuji film fine pix F470 are not working.  I am 99% sure this is a mechanical issue.  They got "balky" at first and now some won't work.  The other evidence is that some of the functions on the up/down/left/right still work, so I believe that the electronic interface is still "talking" to the buttons...any ideas on "cleaning" the buttons?  The wide/telephoto and left/right are the ones that don't work.  I don't recall dumping anything on the camera or dropping it in the toilet but I don't baby it either. 

Love the camera...it is our fourth like this in the family.  Mine is the only one puking.

Marty