Peugeot v clic won't start on cold or damp mornings?

My V Clic was new last July, it started ok, but for the last couple of months won't start easily at all when it is cold or damp in the morning, I have to kick start it and that can take ages too. Later on in the day it starts fine. I have taken it in to the dealer but they cannot find anything wrong with it and it starts fine for them - though it was quite warm on the days it was in the dealership. Any ideas?