Why is my Kia Niro's gas mileage dropping?

I've noticed that my Kia Niro's gas mileage has been decreasing over time. What could be causing this and how can I improve it?

It's possible that your tires are not properly inflated, which can cause a decrease in gas mileage. Make sure to regularly check and maintain tire pressure.

Another factor could be your driving habits. Avoid aggressive acceleration and braking, and try to maintain a constant speed for better gas mileage.

It could also be an issue with the engine or fuel system. Consider getting your car serviced to check for any potential problems.