My neighbor now hides her TV remote in her purse because she says that people are coming in. Any suggestions?

Call APS and ask for advice.

Your neighbour is very fortunate to have you nearby. No family that you're aware of, or does anyone else check in on her?

Yankee, you have been a good friend and neighbour, but I can't understand your reasoning in trying to maintain this lady's "independence", dementia is progressive and everyone eventually needs round the clock care. If there is no one else then calling APS is the right thing to do, she may thrive in a safer environment.

Are there any relatives that you can call? Your neighbor is, unfortunately, only going to get worse. Better to get someone on her case before things deteriorate too much. If there are no relatives to inform, then call your area's Adult Protective Services and tell them about the situation.

Is this the neighbor you have POA for? Sorry, I wasn't aware of your previous posts, Yankeetalker, but I went back and read a few things. You're the POA for financial or medical or both? Is there any money by which you could pay for in-home care to come in for a couple hours each week for now? It is only going to progress, but having a care agency involved might help to assess your neighbor's ability to live in their house. Does the neighbor have a doctor?

Yankeetalker, for the purpose of getting good input from AC users, might be a good idea to keep one of your question threads going for good.  I can find the info about "no, there is no family" and "yes, there is a doctor" in other threads. It's easier to get all the info in one spot, though.

But you do have POA for your neighbor? And why not start with in-home care a couple times a week to see what ADLs neighbor can still do on their own, if any? What does neighbor's doctor recommend?

I have had my own health issues and then we just went through hurricane Irma and now all of he clean up. I took her to the neurologist but all he said was that she can never drive again and that she has dementia but not bad enough to be placed in a home and she refuses to let anyone in her home. She said that she likes her privacy. When the doctor suggested having someone come in and helping her she said no. I had to tell her tonight three times that she doesn't go to the doctor until tomorrow morning so she needs to get her night clothes on and relax and she got mad at me and told me that she was going to sleep in her clothes anyway.

Yankee, might be best you can do is to tell the doctor that things are too much, that you can no longer get neighbor to comply with directions that are in her best interest. Then put in a call to APS and get a social worker involved. You're POA, correct? And you're medical or financial or both POA?