I'm not a cloning expert... i've only done it once and i;m in the process of my 2nd go at it... but i did have 100% success with 4 clones the first time... so take what i'm about to say with a grain of salt.

your clones seem like they might be a little tall, i can;t recall exactly, but I think when i did mine they were about 3-5" long.

imho though, and this is probably why yours are pretty droopy, you can probably cut off more of the leaves than you did, those leaves seems pretty long for a cutting with no root structure to support... the water pressure inside your plant is probably a little on the low side which is causing them to droop because the cutting can;t keep the water pressure up.

if you cut back the leaves some more it might help (maybe experiment on one)... if you can get your humidity up as high as possible that would help too (spray water inside the dome to bump it up quickly)