Please just let him go now.

GOD bless you Mike and your pop, so so hard, we fought alheimers with my mother in law for 18 years, a crappy life, she did not know anyone for last 10 years. Man it sucks all these bad things, life is not fair and I pray to GOD he has a safe comfotable everlasting home for him. When it is his time, pray on it brother.

Prayers out to your family...