hERES my take on it. I have been vaping for 1 month mind you and i have used both Clearomizers (the smoked white one) and also smokeymizers. the smokeymizers as most of us know have the wick at the bottom and at the top there is a little plug that you remove to fill er up. Now the interesting thing is after i bought these things pretty much every review on you tube basically except for a few gave these clearomizers and smokeymizers really bad reviews. the white clearomizers (not clear) the trick to filling them is instead of sticking the short needle directly DOWN one of the two holes, what i do is i push the needle up against the side of the hole so that when i press down the needle is rubbing against the side of the tube and what that does is it mostly prevents creating a LARGE rip in the rubber flange , so this in turn results in LESS much much less leaking in fact the last 2 have not leaked at all. the funny thing is the one that i had that did leak , thats the one that i injected the needle DOWN STRAIGHT in the hole and when i looked at it i saw that RIP in the flange which was wnough for the thing to start leaking. when i started pushing the needle on the side of the tube the tearing was very minimal so the liquid really couldnt get out, IM A HAPPY CAMPER! most wont agree with me cause the review i watched people dont want to have to tinker with these things and thats cool, i just happen to be obessed with making these work. I ALSO have silver non clear metal clearomizers, and those are great cause #1 NO LEAKING, STRONG , and even though you cant see through them i figured out how to refill just by injecting a half of ml, just to be safe,, when the vapor is gone i fill another half.. this works for me,, grant it ok i have tinkered with a few of these and lost 2 or 3 , but SINCE then, ihave been roating a few and THEY VAPE, THEY DONT LEAK... not bad for a newbie. now with the smokeymizers those you have to remove this annoying plug and the key is to put the condom on when filling and make sure the needle is not totally covering the hole , you want to leave some path open and tilt the unit and fill SLOWLY , very slowy, then cap it off wit the plug. I HAVE BEEN USING THAT ONE for 2 days NO LEAKS.. HOPEFULLY , my luck will stay like this.. but again i like messin with these and just wanted to shae info later VAPERS