How to lower the djembe skin

Last month I encountered a problem that is well known to everyone that ever tried to mount a skin: I couldn't lower the rings enough. The reason was that the skin I mounted was very thick and I didn't lower the rings enough when the skin was still wet. In fact, I needed a not-too-tight djembe for the accompaniment, but it was difficult to play with this one.
Then, after a week, I got this brilliant hint from Sega. Here is the procedure to lower the djembe skin after it has dried, assuming that the circles are not too tight:

1. Untie the knots, if there are some, so that the skin looses some tension. Only the verticals should remain.
   
2. Turn the djembe around for 180 degrees so that it stays steady with its head on the floor.
   
3. Put in a glass or two of tepid water.
   
4. Wait from three up to five minutes (five when you have a very thick goat skin).
   
5. Turn the djembe around so that the water goes out and wipe the remaining water, if possible.
   
6. Wait for fifteen minutes. The humidity will go through the skin and reach its upper layer.
   
7. You can start pulling the verticals again. Take note that the skin has already been stretched and it could lower more than you expect, so go easy at the beginning.