How can I line refrigerator shelves for easy cleaning?

You could try Contac paper. There is a thinner version that is more peelable than the original version.

you can find in rolls, clear plastic liners for refrigerators and also for shelving I got mine at Home Depot and it wipes clean

Try using Glad press and seal. It will protect the shelf and peel off easily. The stuff is great for a lot more than sealing a dish. Need to keep a cast dry? Press and Seal. Want to paint without having to take off all the hardware? Press and Seal. It sticks to anythhing, including skin, but comes off easily. You can also purchase sheets of plastic that are made for the purpose. They don't stick to the shelf but are easily taken out to be washed before being put back in.

You could use plexiglass. Most glass shops would have in stock and could cut to size for free or minimal charge.

Yes , use a shelf liner , NOT the kind with the sticky back !!! Just cut it and lay it down . It can be wiped down or taken off the shelf and washed and dried and put back down .

It sounds like more trouble than just wiping the shelf.