I just had four new tires installed. Within a week a bell went off and the tire pressure icon appeared on the dash. I checked each tire and all were 35lbs. I took the car to the shop where I bought the tires and the tech removed the icon with the dash button. He also had a tech check all four tires and again, 35lbs showing. About 3 hours later, while driving, the bell sounded again and the icon appeared. This time I shut it off using the button. Later, it happened again. This NEVER happened before these new tires were installed. Annoying!!! Suggestions???