Hey I purchased one of these and it was clogging. The last time I used it I had to pull on it really hard to get it to unclog. when I did this I felt particles hit the back of my throat quite hard. I have had a very sore throat for almost a week. I am hoping that it was just hot oil and it burned my throat. Is there any way any metal could have been sucked through the vape pen? It felt like little metal pieces but I cant see how that could be.