I cork my bottles dry. I buy a fresh bag of corks and once I open them I use then right away. The sealed bags aresold in 30 or 100 pieces and are humidity controlled. Wetting the corks , even with a meta solution, invites bacteria to grow exponentially as a warm dark damp place (in the cork itself) is a great place to start a petri dish.Don't keep your new bags of cork in your wine cellar, it is tool cold and when cold instead of compressing uniformly in the corker they may form a vertical crease that can leak. I discovered this actually using synthetic corks that were cold, and then noticed it was the temperature that was hampering my efforts.
I save all my old corks and unused corksfor the kids, they take picture frames and glue corks in them to make corkboards/interesting artwork.