I'm going to yell at my dad over a unwashed plate
Do you really find it necessary to yell at him simply because of a plate?
He is always doing that to me and I am fed up with it.
It's just an unwashed plate though!  If it was something important I might understand, but something so trivial is not worth starting a fight with a family member over.  Just ask him to clean up after himself better!
What did you say? I don't need this fucking advice from a stranger. I will be talking to him my way.
I just think you should try and talk to your dad about his plate in a more level tone. If you go about it in an angry and emotional way, your dad is not going to hear anything that you say aside from the tone.