The other day, I was bass fishing a plastic worn with my baitcaster. I had the 1/2 oz t rig on 15lb SpiderWire Flurocarbon. Anytime I let any slack in the line, the line would twist around the rod very badly. I had to unwrap it by hand every cast and it was not fun. What do you think the problem is? Why am I getting the twists?

Probably nothing to do with the fluorocarbon. Most likely scenario to me is that your worm rig isn't perfectly aligned, or is prone to spin due to your rigging. The spinning would add the twist, and what you described would happen whether you are using fluoro, nylon or copoly. 

 

-T9

Most likely, worm not rigged straight. After rigging and before casting, drag it through the water. If it spins at all, rerig!

I don't know I have never had that happen. How old is your line, that might be it. If it is older it could be doing that from being curled up on the spoll

One of two things come to mind. The first was already noted; the worm isn't rigged straight.  The second involves a question; Are you using spinning gear? Either way, it isn't the line. Something is causing line twist.

Heavy T-rig are you punching? You are using a baitcasting reel, so that shouldn't be your problem, unless you spooled the line with the filler spool laying flat on it's side. Baitcasting reels you need the filler spool to spin on a mandrel, like a pencil with someone holding it, a spooling box or pencil clamped in a vice.

If the soft plastic spins when retrieved fast, that can twist the line but with braid it take awhile.

What you need to do is run the line behind a slow moving boat, see Glenn's video.

Tom

How long has the line been on your reel?

Could be the worm not rigged straight but yes it could be the line.  I've had this happen a few times with fluorocarbon (before I switched to co-polymer) and the best thing that worked for me was to spray the line with conditioner, then tie the line to a tree, back up 40 yards and pull the line tight for 2 minutes, reel back up, apply another round of line conditioner.  Repeat if needed.