Vapira, I feel your pain.
I got two new 6 ml Super Excalibur
tanks and have had nothing but trouble with them. I made sure everything was screwed in and screwed down tight, filled the
tanks up to just below the plastic cap and let the wick soak for a while and set my twist at 4 volts. At first they hit like a freight train, but then I had problems with flooding, leaking, and if I did not do a swirl I got really nasty dry hits. If I tilted the the tank more that 45 degress off of vertical they flooded. I tried fiddling with both tanks and had the same problems no matter what I did. They don't seem to be sealing properly at the top and the bottoms leaked overnight.
Ironically the little 2 ml ego tanks that came with my battery kit both work like champs. I have been able to fiddle with other clearos/sissy tanks and have gotten them to work great, but these Super Excalibur tanks have me flumoxed.