How can I keep my hair curly for longer?

I have fairly straight medium/short hair, when I use curling tongs, it looks fantastic, but after half an hour, the curlys aren't that curl like anymore. I use heat protect stray before hand, and hairspray aferwards... is there a trick I'm missing? Any tips?How can I keep my hair curly for longer?
You could perm it but your hair would be shorter.





Try curling your hair every day, with a better curling iron. Also gel it so it'll stay.How can I keep my hair curly for longer?
do this what i use at night i take a shower than i don't brush my hair and go to sleep like that and i wake up and i have curly hair and i just straighten my bangs and i go to school and everybody says did u do ur hair and i say no try that i have medium hair too
tip:


spray water fog on hair.water will keep hair more curly.
apply a hair mousse afterwards





try shock waves curl shaping mousse from wella





it works very well
use the tongs for longer.
get a permmm !