I feel like I'm getting much lower gas mileage these days. on 2007 Honda Fit

Had my 07' since 06', bought it when they just came out. I feel like my gas disappears a lot faster these days. Is that just the ethanol or do I need a flush or cleaning?

Asked by for the 2007 Honda Fit
have your sparkplugs checked.carbon might have accumulated in its tip causing fuel to burn slowly.remove those carb depo by scraping it off..that might help