How do I keep ants from getting in my trash?! Its like I cant throw fruit away even though the trash can is a step-on one. Seems impossible!

They find their way in the house and in the trash. I went in my kitchen today which is CLEAN, but food being in the trash of course, there was a line of them. I had to clean them all out and they are gone now. But they will be back if food is in there