Answers (5) Answerer 1 sleep with it wet in a scrunched up bun, when you wake up blow dry it if its not completely dry and spray hairspray before taking it out, then hairspray it again when you take it out. it won't exactly be curls but it will look a lot like its curly and very natural :) Source(s): there are a lot of hair sprays that do something to make ur hair curly, easy to find in stores, like Tesco, Asda and sainburys just look for something that says: healthy curls, bouncy curls, curls care, or something like that. OMG I know! Buy Tresemme Flawless Curls Mousse First. Wash your hair in volumizing shampoo and conditioner. - any kind! Next scrunch the mousse into your wet hair. Then, get rollers and put them into your hair for 20 minutes. Now take them down! OR you can put the mousse into your hair at night, put on the rollers also. In the morning take them down an LIGHTLY run your fingers through them. Now spray hairspray on it to hold the curls! :) My hair is really strait too I can't keep it curly for a long time so most of the time a use a curling wand and hair spray. If you want a heatless way to curl your hair I got this curlers at target a while back they are like a pipe cleaner and you wrap your hair around it before you go to bed the