I did this not too long ago, I heated the oven to 175*F (79*C) and spread the shredded tobacco out on a cookie sheet. I then made a casing liquid of 4 ounces water to 1/2 tablespoon honey. (I heated the water up in a pot, scooped out the honey and stirred the water until the honey had melted and mixed with the water) I then put the solution into a spray bottle. Sprayed a light mist on the tobacco, "baked" for 10 minutes" reapplied and did this 6 more times. It starts to smell different. At first it smells a bit awful but the smell starts to change into a slightly sweet tobacco smell. I then took it out and let it air dry until REALLY dry, and then slowly brought it back into case in a plastic (food safe) tupperware with a small saucer of water in amongst the tobacco.
I don't know this for certain but I think adding more "sugar" (IE honey) would help mellow it out more.