When I rented, the rental agreement, included a non-refundable cleaning charge of four hours. If extensive cleaning was required, ( more than four hours), that cost would be deducted, from the security deposit.
Being a neat person, I just paid the non-refundable cleaning fee. The owner who was careful to who he rented his home to, drew up a contract, that very clearly stated, what he expected of his tenants.
After I bought my home, he called me up, and asked if I wanted shelving, he was removing form his garage. I did, and had them installed in my new home. Saved me a few hundred bucks.
You give what you get. Obliviously, I must have done something right.
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"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).