I think you may be out of luck. As a Marylander who worked out of state the last 6 months, I contacted UMD before I applied last cycle and they told me the three big things were to keep a MD state license, pay MD taxes or have parents who do, and retain your MD voting registration. If you do not have all three you need to contact the school to see if they count you as IS. I do not know the requirements for Ohio so you should check and see if you qualify as instate there.