I would like to share you an idea how to heat up your doll.
I read about owners who has doll with heating system and having issues adv. hands remain cold, much waiting for reach temperature. Some of us using electric blanket and heating pad. I have never tried these because I thought it would be better having some greater mass (liquid or solid) which stores and transfers the heat. These methods above unfortunately do not have a massive store of heat and store it for limited time. I think mass is essential for a fast and accurate heatup.
So I ended up putting my doll on the radiator. No.
No way! At last I found the perfect for me. It is for me, because I know we have different location, weather conditions, and possibilities, so heating methods may differ by its owner. This is fillable bag (bag-in-box without box). I doing this method from 2022 autumn, when cold season started, and I live on temperate climate.
Here is a step by step guide to what I do.
1. Buy some fillable bag from the local vinery. Ridiculous cheap (~1 $/pcs.). Measurements: 50× 30 cm/10 liter. ~3 piece of bag can cover a full sized doll.
2. Fill the bags with clear cold water. Do not fill fully, ~ 8 liter will be enough. With that quantity, the bag will get the shape of the doll.
3. Close the bags by placing the plug/tap, leaving no air inside!
4. Place the bags to a warm place. I have radiators in my room, and the heating starts automatically by a thermostat ~after 12. So I place them on the radiator(s) before I go to work in the morning, and at 17 when I arrive I find them fairly warm (above 40°C measured). I got the best result, when the water in the heating system running ~60°C high in this period.
I also tried placing them into my car. Windows up at morning, and leave them for late afternoon. It works, but only on fully sunny days in the hot seasons.
5. Place the bags on your doll, leave it for 1 hour, place a blanket above. Then change doll side and do the same.
Result:
I got a fairly warm body, touchable almost every side. I have a 6ye brand doll, and the heat did not ever damaged or deformed the material. These bags works similar as heating pads, but much cheaper, I recommend everyone, who has similar conditions like me.
I hope you like it!
I am curious, so tell me if you already tried heating like above!
Hope you don´t have a cat beeing left alone when leaving the house. 
Did you notice any water or moist condensing on the doll or elsewhere btw? cheers 
