So I was driving yesterday in the rain.. went out for dinner came back. Then, went to take my friend home and no problem there.. got back parked the car. Next mosring got in the car (parked it dead on the 100,000km mark ) but anyways.. it wont start... the spark plugs seemed to be kinda going earlier.. I don't know when the were last changed cuz I bought the car used. What do you guys think is the problem?

Trevor