I always mist the hair with a little pocket-sized atomiser bottle. Even if I`m away from home and I want to `tidy`my hair a bit , if I`d been walking about outside and it was windy, I have my little bottle of water to hand....a few blasts of moisture, then `fluff`it up a bit and I`m good to go again.It only holds about 20mls of water and has a pump-action top.
Also, if sleeping with your system bondedon, you should use a satin or silk pillow-slip as cotton can have a drying effect and cotton fibres are capable of snagging hairs and snapping them off as you turn in your sleep.