You might also want to consider that what is warm to you will be cold to the
elderly. They may find a way to defeat whatever you do.
True - the liver produces most of the heat in the body apparently, and if
that`s starting to pack in, they feel cold constantly.
Happened to my father in law over the last couple of years before he
died.

Forgot to add - the purchase of a decent electric blanket was probably
the best "not an early christmas present" gift he`d had for some time,
and made his final months a lot more comfortable...

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