Hot Rollers? Or Sponge Rollers?

I have long (about 6 inches below my shoulder), thin hair... and i have trouble curling it :/ I've tried using the curling iron before but its only about 30 minutes until the curls fall out.. I've never tried using velcroo rollers, sponge rollers, or hot rollers and i'm wondering if any of them really... show more I have long (about 6 inches below my shoulder), thin hair... and i have trouble curling it :/
I've tried using the curling iron before but its only about 30 minutes until the curls fall out..

I've never tried using velcroo rollers, sponge rollers, or hot rollers and i'm wondering if any of them really work??
if anyone has had the same problem before... please tell me what you used!! lol.. im so desperate..

btw i want to achieve a spiraly-curly look... not wavy... if that's possible with thin hair!

thanks in advance :D
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