So I made some adjustments to my T3 heads last night following a very thorough cleaning. I left all of the tubes in a cup of hot water and vinegar to soak as I adjusted the heads. I removed the center post (gotta wiggle it a little if it's not giving easily), removed the flavor wicks (they're the loose wicks sitting on top of the main wicks which are held in by the coils), gave everything a good rinse, then I did a dry burn (before putting the posts back on, so the coil is exposed).
Some of the coils were noticeably dark or 'gunky' looking, so I just did a quick dry burn, 3 second bursts about 4-5 times depending on how dirty it looks. After a few times, the gunk on the coil appears to disappear and the coil looks 'normal' and the wicks look white again. I also had the silicone cup seal flipped over, but I put it back to how it originally was since I removed the flavor wicks.
I have to say I like the results of the changes so far, one of the heads still has a really tight draw, but it has seemed to improve the flavor a bit. Hasn't gurgled or flooded yet, but we'll see.