Squeeze the seed pods; if the pods are ripe, black seeds will spurt out. Squirt them into a small container of water, such as a pill bottle or a baby food jar. Shake the container vigorously for a minute, then pour off all the wter that you can. repat this about 5 times, then pour the cleaned seeds onto a paper towel to dry. After they and the paper towel are dry, scrape them off the paper. They are now ready to be sown. For that, you can use potting soil, but I prefer long fiber peat moss such as is used for orchids. The seeds must be exposed to sunlight for at least a few minutes, otherwise they will not germinate. Place the pot into a plastic bag and keep out of direct sun. Germination is usually in about a week.

Madabouteu- When I squish, my seeds are clear/yellow- are they not ripe? - Gwenn

Correct - not ripe yet. Ripe seed pods will detach very easily from the spent flowerhead.