I use a kleenex to spread peanut oil on my cutting board
to prevent it from drying up. Kleenex shreds very easily.
It just turns to goo, leaving sludge everywhere. A bit of
a pain.

The logical alternative is to use a rag. But this seems
environmentally unfriendly because it will be soaked with
oil and take lots of soap and water to wash out. (The
shredding kleenex is also environmentally hostile, but I
tend to think less so because there so little of it).

What is normal practice?

Thanks.