Ive always keep the 510 clean, and the problem continued.
Yesterday i rewiked it and noticed a really small hot spots, i think that in fancy coils its hard to work out hot spot or even visualize them, so i spaced a little bit and it has been working great! Ive the give the reason to Wayneo.
From now one i will keep all my coils for tc a little spaced
Thanks you both!