Pre-wet filter, place in filter cap, and screw into brewing chamber. Set on top of your mug. Add 18g medium-fine ground coffee (or use aeropress scoop) Pour in 36g hot water (just enough so all the grounds are saturated) and stir After 30 seconds, add water to the 4 mark, and insert plunger just above coffee to prevent dripping Wait 40-60 seconds and then slowly push down for 25 more seconds
Check out Onda Origins full brewing guides for more info here.