They will come apart like the clearos without too much fuss...
In
this video you can see Shan pop one open...easy peasy (note: the chemicle she describes in the video isn't used in Rev 5)...I've done this with a couple and it really was that easy (I heated the bottom a bit with a small butane torch...just a touch....didn't even melt the black sticker finish). If you have problems getting it back together without leaks...just put a fine bead of super glue around the base before popping the sleeve back on. It's totally safe (dentists glue caps on your teeth with this stuff...physicians super glue cuts back together instead of using stitches these days...no worries there)...and a little heat will break the seal if you ever want to take it apart again.
For me it's easier just to grab a fresh carto for any new flavors and only clean the coils evey now and then as described at near the end of this post here.
BUT if you wanna...and you have a flavor that's so strong it needs to be 'burned out' or 'super flushed' to get rid of it...
Here's an easier way:
Use your trusty syringe with a 16 to 18 gage needle.
Fill it about half full with Everclear, Vodka, or good ole scalding hot water (distilled is best if you keep it around).
Shake it up good...
Stick your syringe back in so it's about half way in one of the filler holes, turn the carto upside down, and draw all the fluid out...
Repeat this a few times....you can try it with the big ring in as described above...or pop it out for more room to flush and shake out all the fluid and let dry. I just leave it in myself. I like to use the PGA as it evaporates out easier and faster than water.
Flip the carto battery threads up...
Use the syringe again to shoot your chosen cleaning fluid through the air tube as fast as you can to wash the gunk off the coils. Repeat and inspect till it's clean to your satisfaction.
Juice it up and vape on