It seems like no matter how many times I try mine I can only get wispy small clouds. I've cleaned it and tried numerous types of oil and still no change. I just gave up and put it in my closet today. After watching those clouds kertong was producing I think mine must be defective??
You don't say what charger you are using....if it's the one that came with the Persei then it's not compatable with the 3.0v batteries(if they are rcr123a)
You will need another charger for these. The ultrafire WF-188 or similar.
I'm liking the 2.4ohm Omicron carts at 6.0 or 7.4 volts. Obviously just short three second hits. I have filled two three and two four ohm carts and with my shitty luck all four taste bad!! The Omicron carts still taste great though, even after numerous grams of concentrate.