This one is SO simple.
If you’re composting properly then your tiny bit of remaining trash should be pretty clean and dry.
If you’re still using a plastic trash bag to line your can, STOP.
You’re just adding a ton of plastic to landfill.
Your bin is already made of plastic or metal so is super easy to rinse out or give a good clean every now and again. Bin bags are a myth.
And definitely don’t use them in smaller bins around the house as again, all it takes is a good rinse to get them clean.
If you are unable to compost, consider using a large yoghurt tub with a lid / lidded bucket to collect food scraps and keep in the fridge or freezer until trash day, and empty these directly into the external bin.