Non-Refundable Cleaning Deposit - Can I expect Tenants to Clean?

[Dana Holland]

First time landlords here.  The person who helped us set up the lease put in a non-refundable cleaning deposit of $300.  Since it is non-refundable and the tenants have nothing to expect to get back, does that mean that they can essentially leave the place trashed?  (Not damaged, but filthy).   Or can we expect them to do a basic level of cleaning (refrigerator, stove, bathrooms, etc)?  Having the carpets cleaned and stretched before they moved in was over $300 and we will have them cleaned again once they move out.  What would be reasonable for us to expect from them?