You can use 1,2-Hexanediol 3%to สารกันเสีย is the only one in the formula? The information says it can be used, but I'm not sure if it's enough to control the infection or not. I'm allergic. กันเสีย often so I think a lot about using it. กันเสีย specially, this formula is used as recommended % 1. Wa...