Bedding (paper based) in Nest/House

[janiv]

Hi,
For dwarf hamsters (probably hybrid campbell), do you put bedding inside the nest/house (I have a plastic house for them) or you leave it empty?
I do add toilet paper outside their nests and they use it (a lot); however, I don't know what they prefer: house with or without bedding (BOXO - paper based).

Thanks,
Janiv/