Dry buds would not give the smoke a harsh taste, so re-wetting it would do absolutly nothing.

Did you flush your buds of nutes when you harvested? If not, that could be the reason why it is harsh. Unflushed buds commonly crackle when burned, and give a harsh sting at the back of your throat.

Did you harvest at the right time? If you harvested too early, it will give the buds a green, nasty taste. If harvested to too late, same deal.

Re-wetting your buds will not take away the harsh smoke. It makes me wonder why people would even suggest it.