I discovered this after I wasted 30 dollars on a heated eyelash curler that didn't even work.
I heat my regular (metal) eyelash curler with my blowdryer for about 10 seconds on high. I then test it for temperature before I curl each lash. My lashes stay curled all day long!
If you curl your lashes with an eyelash curler, try heating the curler in hot water or with a warm blow dryer before curling, it will work like a curling iron for your lashes. By Anna