text: my is hair so long! how can i dry it really fast? i have long hair it goes down to my butt. i need to find a way to dry my hair but i can't use a blow dryer because it wakes up my little sis. if you can't use a blowdryer and you want your hair dry you should shower at night. take your shower a couple of hours before you go to bed so that your hair has time to dry or you can blowdry it before your sister goes to bed.