I think the same thing when I use mine but I don't think it works that way for me. It does feel good tho and helps my achy body.
I did hear that as well tho but I heard that the temp has to be so high like maybe 106? but also we can't safely get our bodies temp that high...I dont think.
I read that somewhere along the way but like you, I have read so much and can't remember.
But then there is the FIR sauna and that gets the body temp up as well. So maybe that could be.
I am doubting that those little buggers would make our life that easy and die with our heating pads but that sure would be nice!
But if it seems to be killing them for you then I would lay those heating pads all over my body!