Why is the fuel economy of my Volkswagen Passat decreasing?

I've noticed that my Volkswagen Passat's fuel economy has been getting worse and worse lately. I'm not sure what could be causing this, as I've always been careful with my vehicle. Any suggestions?

Hey Sophie, have you checked your tire pressure recently? Under-inflated tires can significantly decrease fuel economy. Make sure to check them once a month.

Hi Sophie, another possible culprit could be your air filter. If it's dirty or clogged, it can really affect your fuel economy. Consider replacing it.

Sophie, have you been driving with a heavy foot lately? Your driving habits can greatly impact fuel economy. Try driving more smoothly and avoiding hard accelerations.

Hey there Sophie, how long has it been since you changed your spark plugs? Old or worn out spark plugs can definitely contribute to a decrease in fuel economy. Consider getting them replaced.