cut down on the light intensity and increase the humidity. I use a 2 liter bottle with the bottom cut off and put it on top of the clone for the first 3-4 days, take the cover off mist 3 times a day and when I see roots poke out the bottom of my 2 ounce cup within 7-10 days of taking the cutting, I then transplant to a larger pot and put it under stronger light.