I use medical petroleum jelly on my carbon steel stuffs to prevent them from rust. I think it works better than WD40, and I don’t have to protect my hands while applying it.
And sometimes I mix it with bee wax as wood oil. I think it works.
But it’s either this or hospital. Human body can’t cool down in very hot and high humidity environments, for example 40 degrees and 90% humidity. My mother was sent to hospital due to heat stroke, AC is life-saving. It would be better if there were better ways.