It is best not to use it on totally wet hair just as you wouldn't use a straightening iron on wet hair. It could surely damage your hair and make your hair sizzle and burn. Use a blow dryer first and then use this hair styler on hair that is 80-90% dry.
The instructions clearly states you need to blow dry the hair before using it. It is not effective on wet it, it gives a burnt smell and takes a longer time to style it. The styling works best on dry hair or 20% wet hair, ensure you use a heat protector before styling.