I have never done this before. I learned it from here. FDD has a great thread on it. Some put something under the plant, some cut the tops and put in jars. Once sacks pop collect te pollen and with a small paintbrush dip into pollen, brush on a few lower bud spots quick squirt with a spray bottle and that should be it. Thats what I gathered from here. I like experimenting and trying new shit so if it wroks I will save some $$$$ on seeds.