[TowerTalk] M2 KT36XA SWR Problem

[Bud Trench]

I am experience a problem with one of my KT36XA.

It is an original M2 KT36XA installed in 2009.  It had a decent SWR when
first installed on all bands with a low point at 14.1 MHz on 20M.  Recently,
I've noted a high SWR on 20M.  The SWR low point is now 14.5 MHz.  

I disconnected the feed to the rear driven element.  The front driven
element shows a SWR low point at 14.2 MHz and the rear driven element is at
14.5 MHz.

I have visually inspected the elements and can't see anything.  Any advice
or thoughts?

73 Bud AA3B