Never tried it myself. I did provide clean urine to a friend, but I think their plan was just to wear it in/near their crotch long enough for it to warm up.
I’d imagine microwaving might work, as long as you didn’t do it too long. But, I don’t know if there’s some ions or proteins in urine that are more sensitive to microwaves than other heating methods.
MutilationWave@lemmy.world 5 days ago
Yeah but microwave would be hard to get the temp right. It’s better to use hand warmers. Not that I would know anything about that.