the cleaning it out might be doing it if u have a nose that bleeds easily, and on the doing it lightly rather than far up with a straw i also get better effect but i like using my straw so i just do bigger lines to compensate and it seems to keep me high longer, anyway the whole point of snorting something is that the sensors in ur nose get the coke to ur brain faster (other than smoking/injecting) so use ur left nostril and after uve done the lines i like to take deep breaths to get it flowing