OP, are you using egg crate and cardboard for the wads themselves?
Not so sure that's the best way if you are. Look here:
http://www.durofelt.com/image_26.html
If I were you, I'd order you up some of this 1/8" hard felt. Then, look up "Gatofeo #1 lube" recipe. This is a great wad lube and is a mix of beeswax, mutton tallow, and paraffin wax. You can also omit the paraffin if you want and still have a good lube. You should melt up some of that lube and then moisten the felt with it. Then, punch your wads. You'll be rewarded with an extremely easy clean up and excellent accuracy. Your gun will run cylinder after cylinder.
Crisco might work okay during the winter, but when it gets warm it will run all over. With the felt wad, you'll get a wiping effect of the bore with each shot, and with the mentioned lube recipe you'll get a nice deposit of lube on the bore with each shot, which really loosens up powder fouling.
Just a thought, it's more work, but the results will be worth it, and it's part of the fun of black powder!
PS: The wads you make with the above method will be about 1/4 the cost of store bought wads. Far cheaper, and every bit as good if not better than Ox-Yoke brand wads.