Ok! lol
First, are you separating out the people who complain about a burnt taste and are just running their Kanger device hotter than they need to or should? These things should always be started at your lowest possible voltage - new or dry burned. Move the voltage up from there only as needed. Especially true if you are using 1.8 ohm coils. I don't like the 1.8 ohm - they just get too hot, too fast and there is no where to go to drop the voltage as far as you may need to.
[BOLD]When you dry burn, are you burning until the wick & coil stop producing smoke? If not, you aren't done dry burning.[/BOLD]
How are you handling the top wicks? If you don't have a gas oven you need to expose them to some other open flame to burn the crud off those too. This is where long handle metal tweezers come in handy. I've found that most top wicks don't last more than one or two cleanings, depending on how "generous" they were with what was put in there. Very quickly the top wick has to be replaced with the material of your choice. Even some cheesecloth can be made into a replacement top wick if you are "crafty." Toss any used cotton wick instead of trying to dry burn it, of course.
You can't just remove the top wicks and leave them out. That results in the coil flooding with more liquid than it can handle, and vapor production actually goes down - not up. People then try to compensate by ramping the voltage up. And that gets you right back to what you were trying to cure: harsh burnt taste and more flavorings in the liquid burning onto the coil than actually turning into vapor.
The other things you have to make sure you do with a cleaned coil - besides starting it at low voltage - is give the wick a minute to absorb liquids again.
I'm betting if it tastes burnt to you after cleaning you either
didn't dry burn it enough
didn't give a dry wick a chance to absorb liquid
starting running the cleaned coil too hot
in that order.