Just practice your clone game until 95% of them come in at a week or under, then they stay nice and green. I like Root Riot type cubes, just moisten every other day and wring out the excess like you would squeeze the water out of a sponge-keeping their environment nice and consistently warm really helps too. You'll find they root much faster at 78-80 deg, it's more a factor than cloning gel in my recent experiments. Also, too much moisture is the enemy, keep them less moist and they'll root faster. Good Luck!