When you put the bedding in, scatter some food on top and she'll be more interested in that
Is your hamster very young? They will try anything to see if it's edible. Our last hamster tried eating potty litter but spat it out again thankfully (it's not good stuff to eat which is why I use Chinchilla sand instead now!) Our Syrian pouches sand! Well I think he does because he manages to transport it to the other end of the cage underground!