Why is the gas mileage on my Toyota Corolla decreasing?

I've been noticing that the gas mileage on my Toyota Corolla has been decreasing lately. What could be causing this and how can I improve it?

One possible reason for a decrease in gas mileage could be a clogged air filter. Make sure to regularly check and replace your air filter to improve fuel efficiency.

Another factor that could be affecting your gas mileage is under-inflated tires. Be sure to check your tire pressure regularly and keep them properly inflated for optimal fuel efficiency.

You may also want to consider your driving habits. Aggressive driving, such as sudden accelerations and hard braking, can significantly decrease gas mileage. Try to drive more smoothly and steadily to improve fuel efficiency.