WARNING - well, until the film must come down

I loved the article, when I saw him on Amazon.
When I had him then, everything first well. Panel function super, magnetic force a little weak. You need good magnets. But as far as I was satisfied.
But now: the extract! So the film has down ... Right at this point let me tell you I have placed the film at an absolutely smooth, painted door. So it is not because of a rough surface (eg wood) or something.

1) The film consists of two layers. The upper (thin panel) dissolves on removal from the bottom.
2) The lower (thick, magnetic) remains stubbornly stick to the ground !! You can abpulen only with a lot of patience in small shreds. I have (no kidding!) Already blistered 2 fingertips. And after more than 2h work I grad times get a fraction away !!
3) Is the film down, nasty, yellow, hardened adhesive residues remain. Since only a lot of patience, and alcohol is also similar help. The design is certainly difficult depending on the surface. To this end, let me tell you in my apartment it is even in midsummer never so hot that this may be the reason for the hardened adhesive.

So, if one before the film has to be stuck forever, all right. Forewarned is anyone who needs to remove this again sometime! It is to assert an outrage by the manufacturer that this is possible without any problems. This was in the supplied instructions.