Corncob dont really do much for odor. And can be very rough on the rodents feet.

I use either soft pine shavings or pine pellets. Both work great for me.

Those that been to my house can vouch the pellets work well considering my rodents are in 82F room.

It does stink after a while with any animal. Natural odors are something you need to get used to then your good to go once your past that.