- Water is too hot! When preparing the water, be sure that it is at the right temperature which is just before boiling. If the water is boiling let it cool down, otherwise it can cause the yerba to get bitter. Likewise, if the water is too cold, it will taste "washed" or lavado.
- Putting too much or little yerba in the gourd. The gourd should be filled up roughly between 1/3 and 1/2 of the size of the gourd. It is similiar to too hot/cold water, if you put too much you risk clogging the bombilla, if you put too little then the mate can taste a bit washed.
- Not adding anything to the mate. In Argentina, we add honey, sugar, coffee, lemon or orange peel among other things. Don't get stuck just drinking plain mate, even though I mostly drink it plain or with honey, it is always good to try different combinations as everyone has different preferences.
- Pouring incorrectly. In a traditional sense, the water should not just be dumped into the mate. Rather it should be poured either to one of the sides. Gauchos are particularly sensitive to this.
- Drinking it too slowly. Do not leave water in the mate for too long as this will create a bitter taste. So what does that mean too long? Really if you are not ready to drink the mate right away, do not pour water into it. After you poured the water into the mate, then try to drink it within 10-15 seconds (this is rough timing).
- Buying poor yerba. If you are reading this then you have seen the reviews for a number of yerba's on the market, with more to come soon. You can use this to guide the selection process, but in general, be careful of yerba's that contain a lot of dust as this will cause a poor mate experience by either clogging the bombilla, not offering the right taste as too much dust and not enough of leaves will limit the true flavor.
Hope this helps you have a better mateada!
Que lo disfruten!
El Nacho