If the wicks are loose, check the stem and make sure it's pushed into the hole all the way. It's like an espresso tamper - applies pressure to keep all that wick stuff in place.
The wick with the coil around it is a PITA to change, but what's probably falling out are the two loose wicks that sit on top of the coil. Those are piece of cake to replace. Just lift up the silicone cover thingie, wiggle off the stem (easier to do when it's on a battery), and remove what remains of the loose wicks (careful not to pull out the one that's coiled). At that point too, you can see if it needs dry-burning or not. Then just lay some new wick on there (right on top of the coil) and push the stem back in. And that white silicone cover thing. I've been replacing mine with one piece of 2mm silica/fiberglass, and I make it a little longer to keep the coil a little wetter. That actually works quite well, until after a few fills when it gets too wet and drippy. Then you have to rinse and let dry.
thanks for the information, i'm planning on waiting till my current heads are leaking too bad, then disassembling (yes i will be disassemble number 5 lol) them to see how they work, and mess around with them, i've been reading a lot on the topic and have a fairly good idea what i can do