So for the last six months I have been putting on my face two different perscription sulphur-based acne treatment creams, (which have been working quite well) and I also know that sulphur is flammable and is used in matches, gunpowder, fireworks, etc., so if I go through one of these puffer machines and it dislodges microparticals from my skin, will I test postive because of all the sulphur I've been slathering on my face?