you take a pen and take the i k cartridge, you take the shell of the pen, you take a Q-tip, cut it around the end (long enough to get inside the pen shell a bit) and put it inside as deep as possible, you put aluminum foil around the pen shell, it needs to touch the Q-tip, put a bit of water on the q-tip, must be wet but not wet enough to leave water on it, draw lines on your hand until it doesn't leave (too much) water, so that it's conductive, now use