bcz of similar situation before, I might have a suggestion that could work for you. In the mornings, I often use a portable ceramic space heater. It's compact and provides a good amount of warmth for those chilly moments before heading out to tackle tasks like starting a generator.
What I really like about it is that I can place it near me while I'm getting dressed, and it quickly warms up the area. It's been pretty reliable for me, and I haven't experienced any issues like with my previous heating devices.
you might want to look into a ceramic space heater like the one I use. It could be a great alternative to the Heatbuddy and help you stay warm in the mornings.