I'm going to give the voodoo wool ago. Hopefully I'll get some joy from that.
Sent from my iPhone using Planet of the Vapes
It looks to me like you have two issues here, possibly.
Firstly, flavor molecules/particles are bigger than the same in the other ingredients of your juice. These larger bits are being filtered out by your wick. Hence no taste.
Firstly.
The fleabay silica, could be anything from anywhere, and is more likely to be c..p. And the flavor can't get along it. I use stealthvape silica, the same as most.
Secondly.
You say you get the same with cotton. This could also be a filtering out issue. But not from c..p cotton. More likely you are using to much cotton in the coil.
Now before you run off and spend all your hard earned. Give this a try.
Take one of your home made coils, wick it with 50% less cotton than you normally put in. Slap in an evod, and before you put the evod together, give the wick a good soak with juice. Then put the evod together WITHOUT FILLING. And vape it like a dripper. If you now get a little flavor, you can easily open it up and reduce the cotton wick some more. If you find it good, then fill the evod a little, and check it doesn't p..s out the bottom.
If that doesn't work, I don't know what else to suggest. Sorry