My question involves an eviction in the state of: PA

I must evict my daughter from my house. She does not abide by any rules. She will leave my grandson with me even after I tell her that I am not willing to babysit. Although, I really love him. I just don't want her shirking parental responsibility. She has custody of him every other week. I have requested that she not go out during her custody week. She does not pay any rent.

What is a formal eviction? Do I write a letter and have it notarized? Or, just give letter with 30 day notice, initially, then go through courts, if she refuses to leave. Or, do I need to contact the court to start the eviction?