I've never pollinated an MMJ plant, but I've done some flower pollinating as a younger kid in my mom's garden and we always used a q-tip with the fuzz fluffed up and twisted to a fine soft point. You almost want to not touch the pollen with the tip of the brush so it only gets the smallest amount on it then you can be a bit more aggressive in the female space because you'll know you really don't have a noticeable amount of pollen on there. If it's enough that you can grab it on your fingers, that could potentially pollinate a 6k flower room if it hit the air currents moving around!
:smokebuds: