I have a TC Omega Muzzleloader. It shoots fine but the breech plug is seized. I busted some time ago I busted a breech plug wrench trying to remove it. So I figured I'd wait until after the season. Here I am, the barrel removed from the stock, the scope and wrings removed. At the moment it is upright with kroil soaking around the outside of the plug. Not sure if should squirt some down the barrel to get at it from the inside of the barrel, I guess I could swab a patch up against the plug and hope some soaks in around it.

I don't have a barrel vise. I have a regular vise and wrapping the barrel in a towel it just spins in the vise. I'm hoping to get it loose enough so that I can get it out with this set up.

Anything else I can do? Heat it up with a blow drier?
Thanks