Murrbuck

I just purchased a 2016 Highlander. We love everything about it but sometimes it doesn't want to start. We push the "push to start" button and it takes 5 - 10s to start. There is also a smell of gasoline when this happens. It was happening about 50% of the time but seems to be getting worse. Starting it cold actually seems to be better but not every time. Starting after it warms up and has sat for 20 - 30 minutes is guaranteed to have trouble. I still have some warrantee left but would like to know what everyone thinks.