Felix, if for some reason you will be leaving it charged, use the ball and grease over the top. The lubricated wads, ok, but in the original period of use, not too common because of worries about powder contamination. The wedge, as noted, a soft mallet, piece of wood will work.
If you have an extra cylinder...do not do what they used to do (in battles anyway), tap the wedge loose with the cylinder. Marks up the wedge, and some trouble if a cap is struck on the spare cylinder...
After you disassemble and clean it, put some lube on the arbor (the pin on which the cylinder rotates), designed for that, and will keep it from powder binding somewhat longer