Well, my advice as a professional and expert is to stop using it if you start to notice blood.
And yes, that was a serious and relevant advice.
No offense to the brave people of america but some of ye doesn't have the light on at every floor if you know what i mean

Sorta related, I watch all 5 hours of this pellicula about NK movie scene
https://www.youtube.com/watch?v=0T-pPPUAppk