Wiper switch probs

[DOUBLECAB]

Hi Guys...........have a 2008 Transporter T5 with the 2 master window winder control switches on the driver's arm rest which just stopped working.

The passenger side switch on the passenger arm rest still works fine and using the key manually I can raise and lower both the windows.

Accordingly as the window winder motors work fine I assume the prob is in the driver side arm rest switch.

I have checked the window winder fuse and its fine.

So does anybody know how to 'popout' the switch on the driver side arm rest to have a sticky to see if a wire has come adrift or has anybody had a similar prob and can throw me a solution because with the warm weather now in my neck of the woods its a pain to be driving with the window up?