frank1492 wrote:
I live in Massachusetts and squirrels have gotten into the area above
my sun parlor ceiling though some rotted fascia board. The entry point
is clearly visible.
Before trying to drive them out (I propose loud banging,
mothballs and ammonia soaked rags

Caution, rags soaked with ammonia may not work, they will just smell like
urine. Most wild animals have no problems with "natural smells" like urine,
etc. I have found that most animals cannot stand chemical smells. So try
something un-natural in the smell you want to use.