Why is my Audi A1 using more fuel than usual?

I have noticed that my Audi A1 is using significantly more fuel than it typically does. What could be causing this and what steps can I take to improve my fuel efficiency?

One possible reason for your increased fuel consumption could be a dirty air filter. I suggest checking and replacing your air filter if necessary. Additionally, you could try driving at a consistent speed and avoiding sudden accelerations to improve your fuel efficiency.