To change flavors, I wouldn't bother to be honest. Within a few vapes of changing the flavor, the new one will overpower the old one. I just put the new flavor in and vape away. I might give the whole
tank (but not the head) a quick rinse if I am changing from a particularly strong flavor.
I use the
rta section I am going to rebuild, but I know a few forum members do rebuild the pre-built coil heads. I've never been successful as every time I've tried to open them up I end up breaking the threading on the bottom or just crushing the head. Every time I have tried to just thread it through without opening them up, I get major issues with wicking.
To be honest I find it easier just to use the
rta section.
There are several videos on youtube how to rebuild them if you are interested.