I used a hairdryer when I started manual stretches. The hair dryer pretty soon died (It was not new, and not made for it).
Then I made a stand for my car interior heater. And in the final months of lengthmastring, I bought another heating fan at 2kW in order to both have a heating fan for warm-ups (Doing: Ball & Lig Stretches), rest periods between sets, and during my stretching sessions. I was able to keep my tissue heated up before, during and after my session (
MOS RED) with this setup. I always had a heating fan blowing at me during stretching sessions, even during stretching.
Just light stretching as warmup would not work for me, when I was aiming for ~ 2 cm temporary elongation after sessions.
These are my heating fans.

A car interior heater strapped on a laptop cooler stand, with an eyewear case strapped under it in order to get an optimal angle of the heating fan.

A gigantic 2kW heater that can push warm air throughout a space, and on my body when I'm stretching. This heating fan was a game changer in order to maximize elongation during sessions with
LengthMaster 3.
I was able to keep the indoor temperature at ~27-28°C in the winter, and over 30°C in the summer. I was forced to use heating fans because I could not change the thermostat in my apartment.
Heating up your tissue is essential for elongation.
But I don't think my setup are useful when you have no privacy. But my belief is that you need a private area and private time, in order to maximize penis enlargement for yourself. Find a space and time where you can be 100% private and not be bothered by anyone.