Ouch beware the microwave
I had been reading about warming with a hotish wrap. I wasn’t so sure my hot water supply was quite hot enough. So this morning I tried the microwave 15 seconds, Ouch!! Nothing was hurt apart from my pride.
However I did find the microwave for on around 5 seconds, much hotter and not uncomfortable than I’d previously been using, and really warmed my unit up.
But beware the microwave err on the side of caution!