I always clean out the cone between tankfuls....
do it on my eGo-c's too.
Only one I ever had a leak with is one I did not fully insert into the cone on the spike.
I could also see where the little air bubble could hold back the liquid though.
On a separate note...
I have like ten type B, LR attys for my eGo-c
since january, I have only used 4...and I have three Cs going all the time.
So, on saturday- i burned up a second atty...my fault- cooked it on my eVic---running HOT !
Two dead attys...? Could they be rebuilt ???
So, I did. Tiny, small parts- some 28g Kathal and like 3/8" of wick and 45 minutes latter, tested the coils- 1.8 and 2.1 ohms.
They worked...really, they worked well ! Not LR anymore...but thats ok.
Ego attys can be rebuilt.