Ok, so there are different reasons why you're not getting big clouds, and why your nautilus might give you bigger vapor. First if you had your holes drilled to 1.8 mm that's smaller than the nautilus' largest hole, which is 2mm. Are you sure it wasn't drilled to 1/8? Another thing you have to line your coils with your holes and when building your coils they should sit at the same height or as close as possible to your holes on your cap. Also too much cotton doesn't help, especially if you want bigger clouds, you also don't want cotton blocking your coils and air holes, so try to keep the front and bottom of your coils clear, also you will have to drip after 2-3 lung hits, with that type of wicking. You also don't want to wick too thick or too thin through your coils. Also your battery does make a difference, in performance and in safety. Also a narrow bore for your drip tip will not get you big clouds, and you want more VG if not all VG in your juice for clouds.
Burnt taste: Not enough juice or you vaped dry, also sometimes cotton will have an even stronger cotton taste with certain juices when first used. It eventually mellows out and disappears.
I also have an igo w, but I use 3 different caps, all bigger than a 1/8 not sure if was 9/64?
And seeing people drip in person doesn't mean you don't get huge clouds off camera, it depends on their build single vs dual coil. air flow and building wrong or right, and juice and technique. Not all people who drip go beyond .5-.8 ohms, and people online, many are at unsafe levels and their are other variables.
