Basically there are three sources for leaks - from the cap edge, from the hole in the cap and through the spike when the wick is narrowed. The soft caps seem to have solved the first two
These are good points Kent,
most of the issues i ever had with ego-t's were solved with soft caps.
Not sure what you mean for 'narrowed wick' but
there's a thing i discovered recently:
the wick inside the spike is one of the most important element for a correct working ego-t atomizer.
recently i had some leaking issues with latest stock of typeB atomizers, i took the plate off these atties and noticed that the wick inside the spike was sort of narrowed/strangled by the mesh tape...
with these atomizers i had both weaker vapor and leaking (it seems like a paradox but it is not),
if the little mesh roll up the wick too tight the juice cannot travel down the wick at the proper rate and it's forced to leak on the outside of the spike (even with the sof caps..).
The depression created (when you draw) force the juice out of the tank and if the wick is too compressed the juice will run off the outside of the spike (then not reaching the coil..).
Some of this juice will be sucked up to the mouthpiece air channels and some will saturate the mesh on the bottom of the atty and will leak at the battery end.
How did i discover this?
just replacing the 'strangled wick' with a not strangled one (taken from another atty) using the same tank, cap and piercing spike.
The issue was immediately solved, bigger vapor no leaking.
the wick inside the spike was the only thing i changed, everything else was the same as before.
That means the strangled wick was the problem despite it was brand new.