The method of brewing coffee with Nel Drip flannel filter cloth

If you just bought a new flannel filter, remove the flannel filter from the metal ring and boil it in water for 5 minutes, then put it on the iron ring. Grind coffee beans. The amount of coffee powder used to make coffee with flannel is more than that of a conventional drip filter; the normal amount is 45-50g; the coffee powder is thicker to grind, similar to that used in a French kettle. Use hot water warm flannelette and bottom kettle for 1 minute, then