I recently bought some clip in 18" human hair extensions. I never bought any before or used them. I wanted to buy the pre-curled extensions because I personally don't like straight hair on myself. Pin straight hair looks good on a lot of people but for myself, I like curly hair. My hair is naturally wavy and I can style it either way. I just like curly hair. The woman who sold em to me told me to NOT buy the curly kind for some reason. She said they just never look good. She said I need to buy the pin-straight human hair extensions. That way I can curl them to fit my style. So I bought them. $180, non-refundable hair extensions. I know I'd like them, only one problem. THEY DON'T CURL!!! Now they are 100% human hair extensions. I've been told by many people that human hair extensions you can curl or straighten, no problem. I can curl my own hair fine. Is there a trick to curling hair extensions? They seem too heavy that the curl won't hold. Anyone have ideas? Now I actually bought these in March 2009 (not recently). I just never wore them. EVER!! Waste of $200. But now I just pulled them out of my closet and decided to try again. I don't want this to be a waste. Tips, Idea's, advice.. Please!!