Dear friends, i have a simple question on soldering.. I am new on soldering and i do not know what is going on with soldering pastes. Are there different kinds of it? When I watched this video i saw is that only the paste is needed for the soldering. BUT when i watched this i saw that the flux is not enough to do the soldering. Some other, told me that soldering paste is only to clean the top of the soldering iron... Please tell me what is going on, give me some advises. Thank you in advance!