just fixed my key fob!
 

dont know if this might help someone else but my key fob for my '98 xj8 stopped working so I was having to lock up with the key.
I took it apart today to see what was goin' on inside,after splitting the cases I lifted out the circuit board and took off the rubber button pad, the contacts under the pad were covered in black grime so I soaked everything in contact cleaner,reassembled,and its been fine ever since.

@ricasso

I did the same thing a while back and got an extended lease of life from mine, but it's starting to go again...... I read another post on here about using a "liquid" circuit board pen on the rubbery pads which you can get from Frys, so I'm going to try that next

Remotes
 

We all must have too much junk in our pockets I just had the same issues with the remote for my XKR ,see link.
https://www.jaguarforums.com/forum/s...271#post191271

Another solution
 

I had a continuous problem with the key fobs from my late nineties Cadillac, and simply using the red rubber eraser from a #2 pencil will do the job. Simply clean the circuit board contact surface and the respective contact point on the rubber. This is a great way to deal with it when you are at the office and don't have the rubbing alchohol available.

Good tip.

This might help http://www.gusglikas.com/AutoRepairxk8Remote.htm

thats it exactly Gus!,many thanks