Where I am currently living there was no shelf liner aka shelf paper in any of the cupboards or shelves. Previous occupant did not use it.
There was sticky brown rings where the pots and pans were sitting.
When I moved here I cleaned ALL the cupboards and shelves. And put shelf paper everywhere. I clean and replace the shelf paper as needed.
I put rubberized lining on the inside of the refrigerator door. It keeps bottles from falling out. And helps to keep it clean.
I am curious. How many of you still use something( even if it is a brown paper bag) to help keep your cupboards and shelves clean?