I have the same tank and your coil looks like mine does after 7+ days.
Next time you build a coil, maybe try 6 wraps if that does not get the desired results try 5…
Also, your coil looks a bit sloppy, try and get all the wire to just barely touch each other. It can be a bit tricky at first but practice makes perfect as they say…
Also I notice the wire from your coil is protruding from the screw quite a bit. Get that cut as close as you can 'cos there is very little space between the coil build and the housing that screws on. Maybe it is just touching and is shorting a bit?
My build for the Kanger is:
5wraps 28g kanthal round a 2mm approx screwdriver.
0.8ohms
Jap cotton
Firing at 4.2v at about 15 - 17watts
I change my wick about every 3 or 4 days.
Anyway hope you can sort your problem out. Good luck bro.