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I can't imagine melting stuff like that without smoke. And where there's smoke, there's fire. You better protect yourself before you wreck yourself! (haha lame)

well dear friend, not exactly. the smoke bla bla fire is totally lyrical stuff. and it is not applied in law of physic and chemistry - well there is even a reaction of turning massive bodies into gases without even turning into liqiud (sublimation), so there is smoke without fire.. even u can use ethanol to produce a fire without smoke.
I Asked my fav teacher of chemistry, lucky i got reply that carbon mask can give me protect from diox. about 99.(trilionx9)%
However she mentioned that a lot of them are already in food,water,air and even in our bodies.

Well, I am using now a vent blowing air so i dont breath it right to my nose like before, so its blowing somewhere ;p
as I said, I am not doing big things there are small corrections, and from time that someone here mentioned about health, i started using is as less as i can. using again hot glue option(which i dont like becouse when u leave something on sunlight it can simply melt. however if its not heavy duty thing i can use it.

Case closed
^ ^ cheers ,
and thanx for participation in this question.

"Where's there smoke, there's fire" is a saying that's used in practically any language (I'm semi-fluent in 4 and I can read some more). I did not mean that there was actual fire or oxidation but that there were gasses being released from the melting (indeed sublimation, I paid attention in school!). Breathe in those gases, and you could possibly be in danger. I'm not an expert. It could be nothing, it could be as bad as smoking or it could be a lot worse. I would ventilate my space good, especially when I can't smell anymore, but that doesn't mean you have to do so.