Respuesta a "Why Wont Solder Stick To The Pads To Replace Hdmi?"I would make sure that the board is totally clean by removing any excess flux or solder that still may be attached. You can do this with a board cleaning pen or you can also find it in a spray. I would also recommend using a rosin flux, like this rosin flux pen from Chemtronics.
Respuesta a "How to clean the tip"Yes you will want to simply wipe the tip onto the sponge. That will remove any excess and clean it off. Also make sure you are tinning your solder tips when you get them, and after every project. That should extend their life and keep them from oxidizing. Here is a helpful article on tip tinning and care: http://blog.gotopac.com/2013/04/11/solde...-tip-tinning-and-care/. Hope that helps!