I always leave a window unlocked for that very reason. Call me crazy but it has saved me time & money.

When I had my first coach we were in Las Vegas and my son-in-law dropped my grandson and me off at the coach and he drove to pick up someone at the airport. After he was down the road I realized he had the keys to the coach! No cell phones in those days, so I slid the driver's window open, put my 8 year old grandson thru the window and he unlocked the door.

Don't tell Louise that I leave a window unlocked!