Windows open automatically

This is completely random. After parking the car, going shopping or whatever and coming back to the car, we find each window open about 2 inches. Now I know for a fact that I have not opened the windows. At once point, I actually saw the windows open when I hit unlock on the car. Took it to a Honda dealer and they said that they couldn't fix it because they couldn't replicate the problem. It's started to get really annoying, its happened before overnight when it was raining outside.