Kleenex is a brand name for a variety of paper-based products.
Kleenex was the first Western facial tissue, introduced in 1924 and has since grown in popularity ever since.
It was originally marketed as a way to remove cold cream or makeup.
In this way, the popularity of the product has led to the use of its name to refer to any facial tissue. (source)
It is often used by hamster owners for bedding to keep hamsters warm and cosy.
So can hamsters eat kleenex?
Yes they can it is fine for them to have in their cages both to use as bedding and to chew on as well.