Na it's not ruined lol. I kept heating it up and used the little metal poker thing they comes with it to scrape the plastic out. I did this thoroughly for about half an hour and there is no remnants of the plastic in the steel heating cup or in taste.
I do however have some questions about my Imag. I have noticed some problems with mine, and I was wondering if they are common with all imags or I somehow got ripped off. First off, when the mouthpiece is screwed on fully it is not parallel with the button, which is quite annoying. Also the screw on type lock of the mouthpiece has gotten looser and looser so it barely feels like a solid click now. To me it seems that it does not heat up to that high of a temperature on low and even medium. I read reviews of people complaining about the hot vapor so I was not excepting this. Coming from a longtime MFLB user, the vapor seems weak except when on high.
BTW I purchased it from a merchant at Aliebaba(Vnice) for 55 dollars with shipping I have only owned it for a few days.