We own a duplex in Hastings, MI with tenants that have been there over 10 years. When we bought the property we initiated a one year lease that has reverted to month-to-month tenancy at the expiration of that lease. Comps are higher now and we want to increase their rent, but the state of Michigan website is confusing in the explanation of whether or not we need to give 30 days or 60 days written notice. Anyone out there in Michigan that can clarify this for us? We appreciate your help.