This is actually sounding like the ick is clogged up and in need of a cleaning.
Fire the katana till the coil and wick are glowing red hot then while it's still hot run it under cold water. Dry and repeat a couple of times.
Then tilt it and fire till the juice starts feeding. Put the cap on and start vaping. It should be 100% better after this.
lord,
with this method, I can never get the wick to glow. Is that bad? I normally do it with juice in there.