how to preserve a twistout

Question for J from Holly:Hi thereI was wondering if you help with this dilemma or throw it out to all the knowledgeable ladies who read your site. I am recently natural and experimenting with styles. I recently attempted a twist-out and the results were great BUT I realised I had no idea how to protect the style before going to bed. I carefully tied a satin scarf over it but it did not preserve