My eyelashes always straightens out?

my eyelashes are really long so when I put on mascara it always straightens out. I use CoverGirl lash blast. I curl my lashes and when I put it on, it stays curl for like 5 seconds then it straightens out. I use 2 coats of mascara like I wiggle it from the root to the top but it still straightens out. Idk what to do. It never looks pretty and curled. I even tried blowdrying the curler. You cant even tell if I have it on. -_-