There can be several reasons your hair doesn’t hold the intended style or volume for very long after curling it. Your hair should be completely, 100% dry when removing the rollers. If you aren’t sure, use a hair dryer or hairdryer diffuser for a few seconds to get rid of any dampness. Once you remove the rollers, brushing your hair instead of just using your fingers to separate the curls can cause them to become elongated. Another reason your curls might not be holding is that you’re using too much or too little hair product or your hair is too clean. Not sectioning your hair in small enough pieces will also affect the set.