I doubt you will have to provide a reason given he is on a month to month tenancy but you should get it cleared with an Ohio attorney so as to not have the judge kick your unlawful detainer for improper notice.

Your unlawful detainer claim should have included all expenses allowable.

You can (and should) start your unlawful detainer action immediately with a competent attorney that specializes in evictions.

Then go to the local magistrate court and file an unlawful detainer lawsuit.

If your tenant is now a squatter then an unlawful detainer may be the appropriate filing in your state.

Spend some time eduction yourself on  how unlawful detainers work in your local market. 

@Horacio Gutierrez  In California, after the 3 Day Pay or Quit Notice, if the tenant doesn't pay you can proceed right to filing for eviction (Unlawful Detainer). 

I suggest starting with that and following up with filing an unlawful detainer if payment is not received.

The process may be different depending on your local city regulations, but the basic eviction process in California is:3 Day Notice to Pay of QuitFile Unlawful Detainer case in local courtProperly serve the court documents to tenant(s)Wait 5 days for tenant(s) responseIf no response,apply for default judgement in court and Writ of PossessionWait 3 days, take Writ of Possession and sheriff's fee to courtWait for Sheriff to give notice of actual eviction of tenant(s)Show up on eviction day to change locksDeal with any personal property as required by lawIf response, then you request a trial date and go from thereI'm not sure what you mean when you write that the eviction service isn't getting it done.

It might be an eviction matter, or it might be called unlawful detainer, or it might be called something else.Second, once the people are "out" of the place and you have possession, then you have to determine how the abandoned personal property is handled.