This is really the hardest part, it is not that hard but it is the most part that requires some work. First you want to buy a big pumpkin, the bigger the pumpkin the bigger the seeds. Scoop the pumpkin seeds into a colander. There will be some stringy pulp that will come out with the seeds. Rinse all under running cold water. Remove as much as you can of the stringy pumpkin things. There might be some still attached to the seeds, but do not worry , it will be easier to remove those when seeds are dry. Spread them on kitchen towel and let them dry overnight.