Translation of unscrew in Spanish

She suddenly had to vomit and unfortunately she vomited on the new shoes of our friend and on her new Jeans. It was very embarrassing, especially because we were treated so well by this nice young man.
We drove to the next spot exactly at noon. We were told that this spot would not be crowded at all during the lunch hour and we were not surprised to find it completely empty without anyone else.
I wanted to share the itinerary of our short backpacking trip in South America. My wife and I are both working, so that we did not have months to travel. Our trip started in Madrid, on September 30.