birdhunter,
I just got a new encore 209x50 also. While I have only had it a short time, it's been a piece of cake to clean. The first time I cleaned it, I used Windex, I've always had good luck using it to clean my Muzzleloaders. The next time I tried T/C #13 pre-saturated patches. Just for convenience, this seems to be the easiest way. I also used JB Bore shine the 2nd time just to remove any plastic residue. Both times I soaked the breech plug in hot soapy water before using a nipple pick to clean it out as best I could. Also, after the 2nd cleaning, I used bore butter since it was the end of the muzzleloader season here in Ohio and it will probably be stored for a while. Good luck with yours.
Scott