Thanks for the reply and advice...
I was thinking about cleaning everything but never just got round to it. But in the last couple of days, whilst drivingmy car stereo would lose the power to it for a split second and then come back on again. I also noticed the headlights flickering a bit. It's getting a tad bit annoying so will try and clean things up and see how things go.
The start up problem is quite random and relatively few and far between, so hard to see if things have worked or not!
Anyway, thanks again for the advice