How do I remove myself as mom's durable power of attorney?

No more. I simply haven't the wherewithal of ANY SORT to take care of this woman called, "mom". Her dementia is more than I can Single-handedly do (2nd attempt as of April 2016 and she now lisves with me) and absolutely NO.ONE will help in the slightest. My health is going down in a variety of ways and I'm 4 sincerely finished.