Second Tip:
If you want coffee to be more tasty, make coffee powder like this. For this you need coffee beans, star anise, and a mixer grinder. First, roast the coffee beans and star anise lightly. Then put both of these in a mixer and grind them finely. Then strain it and store it in an airtight container.
This spoils the coffee powder
There are several reasons why coffee powder spoils quickly. In particular, this powder absorbs moisture and odor well. That is, it absorbs the things around it. If moisture gets into the coffee powder container, it immediately hardens and becomes unusable. So keep the coffee powder away from moisture and other surroundings. Only then will it last for a long time.