I realize you have or think you have it flowing now. I guarantee there is lots still in there. When you can get a bottle of Calgon water softner from the laundry aisle. Put about 2 cups in there when you are going to be filling the black tank. Use some digester as well to be sure you are getting it to digest. The Calgon will loosen the stuck******(pardon the pun) from the bottom and sides. When the tank is at least 3/4 full, dump. We had a paper poop pile we inherited from a previous owner. This worked well. When we cleared the clog and got most of it out we thought we were home free. Then we put the calgon in and digester and filled it with water and let it sit for a day or two. Then we went back to the dump station and it was far from empty as we had originally thought. We are users of the Geo method and it has worked well for us. If it is unusually hot, we will use some digester. We all know you won't ever make this mistake again. I can't believe whomever you bought your rv from did not tell you what to do with your black tank.
