The top 10 mistakes new home baristas make

The Top 10 Mistakes New Home Baristas Make, blog from Clive Coffee, lifestyle
☕ Quick Take

New home baristas often struggle with inconsistent technique, stale coffee, and improper equipment use—master the fundamentals first for consistently great espresso.

  • Always weigh your dose and yield with a scale — eyeballing causes 96% of beginner espresso problems
  • Use coffee 4–14 days off-roast and maintain water hardness between 35–85 ppm to prevent scaling
  • Tamp with consistent pressure every time; adjust grind size, not tamping force, to fix extraction speed

There are a number of mistakes new home baristas can make. We made a video of the top 5 and we expanded to 10 in our article below. Have fun and may the force be with you. 

And below we have the top ten mistakes home baristas can make:

1. Googling espresso tips

Never trust Google with your coffee. Never.

Five years ago, I was a new home barista in need of help. A quick Google search exposed many contradictory "facts" and techniques that muddied the waters of my learning. I became thoroughly frustrated. We based most of the Clive espresso education materials on this experience. 

We recommend learning the basics from a single place with a cohesive curriculum before venturing out on your own.  The basics of dosing, distributing, tamping and brew ratios are best acquired from a source with a focus on teaching home baristas, not professionals. At our showroom in Portland, we teach hundreds of people every year in our Home Barista Class. Our "Learn Journal" documents this approach. While there is more than one way to make espresso, we recommend starting with consistent basics, gaining confidence and proficiency, and then venturing off to more advanced fine-tuning techniques. 

2. Using coffee that is not at peak freshness

Always use fresh coffee like this Bronson blend from Verve coffee roasters, which always has a roast date.

We don't understand why some new baristas spend so much money on new equipment and then use 30-60 day old beans. And, if it doesn't have a roast date on the bag, it is usually far older than that. It's like buying a brand new Ferrari and using some 81 octane fuel you found in an old garage. 

Use "fresh" beans, ideally 4-14 days off-roast and store them correctly.  You will enjoy the experience far more. Please don't put them in the refrigerator or freezer. If the bags are nitrogen-flushed with a CO2 valve (like those from Greater Goods, Verve, and Onyx), leave them sealed in the bag until you are ready to brew. 

3. Not using a scale 

Acaia's Lunar scale is our first pick when it comes to coffee scales.

96% of the problems that new home baristas have comes from eyeballing their dose and output and then making adjustments. When you are first learning, you need the feedback of an accurate scale to ensure that you are fixing the right problem. If you are using 20 grams of coffee to yield 30 grams of espresso and you are off by 2 grams, that is 10%. 

At Clive, every employee uses an Acaia scale every day. We have been doing this forever, and some of us were professional baristas. We still do it. It only takes a few seconds, yields better coffee, and decreases waste. At a minimum, do it for the first couple months until you have the basics down and your recipe dialed!

4. Inconsistent tamping

Proper tamping technique is important, so getting a nice wood tamper can be a good incentive to learn.

All new baristas have fallen victim to this. You pull a shot; it comes out a little fast, so you tamp harder. It's not a sin - but it's not right. Tamping with consistent pressure, completely level every single time is the only way to make great espresso. If the beans have aged a bit and the shot is coming out faster, make the grind a bit finer. 

The second tamping issue we commonly see is a bit trickier, especially when there are two baristas in the same house. My wife and I run into this. She tamps harder than me. She will adjust courser, and then I adjust finer. It turns out the solution was a calibrated tamper from St. Anthony's. Marriage saved. 

5. Using hard or untreated water

98% of espresso is water. The other 2% are compounds that are created by dissolving in the water. Giving yourself a lovely, filtered palette for execution makes the espresso taste delightful. 

Hard water is just a straight no-no. These machines should last a long time. Do not Google descaling an espresso machine. Just make sure it doesn't scale in the first place. Descaling can sometimes cause even more problems than the scale itself. Always keep your water hardness between 35-85 ppm, so that rules out reverse osmosis, unless you are retreating it with Third Wave Water. Every 3-6 months, test your water. Municipal water sources have variability in their hardness seasonally. If you live in a place that gets heavy rains, it can change dramatically. 

6. Improper or neglected cleaning

Clean those screens.

We once opened up an espresso machine and found thousands of moldy ants. Seriously. Moldy ants. 

Coffee is a food product. It will rot and get rancid. When it does, it not only tastes terrible, but it can also be harmful to your health. You would never pick up an old banana that is half rotten and say "It's easier just to eat it." 

Yes, it's easier not to clean your machine. However, the coffee tastes better, the equipment lasts longer, and our techs will thank you if you do it properly. If you want us to remind you when to do it, simply see our Espresso Equipment Maintenance Reminders. 

7. Using low-fat milk

Oatly is by far our favorite non-dairy milk here at Clive. We even offer it in our latte art classes.

Aside from all of the employees at Clive, we're not 20 anymore. I certainly understand the need for low-fat milk. However, it is so hard to texture correctly for anything except cappuccinos. As we wrote about in our milk article, we need fat and protein to produce smooth, silky milk. It's essential. Sure, some killer baristas in your local café can nail it. But you are just starting out. If you want to keep that body lean but also want a full silky cup - try Oatly. It's low calorie, textures beautifully, tastes great, and its vegan. 

8. Incomplete understanding of brew ratios

The brew ratio is your recipe. You would never bake bread without one, don't pull a shot of espresso without one. The shorthand around "what is a double-shot" confuses everything to great ends. So, remember rule number 1 and read our Brew Ratios guide.  

9. Not purging water before your shot

We haven't written about this yet, but temperature is so important for consistent extraction. A difference of just a couple of degrees can underextract your espresso, leading to sourness. As such, always flush some water through the grouphead before pulling a shot. It ensures all of the machine components are at the proper temperature. And while we are at it, please give your machine time to warm up thoroughly and use a pre-heated cup or mug. 

10. Being afraid to explore

This should be fun. Try new coffees. We're always here for suggestions...

Frequently Asked Questions

What is the ideal freshness window for espresso beans?

Use coffee beans 4–14 days off-roast for optimal flavor and crema. Beans older than 30–60 days lose aromatics and extraction quality. Always check for a roast date on the bag, and store beans in a sealed, nitrogen-flushed bag until ready to use—never in the refrigerator or freezer.

Why do I need a scale for making espresso at home?

A scale eliminates guesswork and ensures consistency in your brew ratio. Even a 2-gram variance in a 20-gram dose equals 10% error, leading to sour or bitter shots. Professionals at Clive Coffee use Acaia scales daily—weighing both dose and yield is essential for dialing in and troubleshooting extraction issues.

How often should I clean my espresso machine?

Backflush your machine every 1–2 weeks and deep clean the group head monthly to prevent rancid coffee oils and buildup. Coffee is a food product that rots, affecting taste and machine longevity. Regular cleaning maintains flavor quality and prevents costly repairs—Clive offers cleaning reminders to help you stay on schedule.

What water hardness is safe for espresso machines?

Keep water hardness between 35–85 ppm to prevent scale buildup without over-softening. Hard water causes damaging mineral deposits, while reverse osmosis water is too soft unless remineralized with products like Third Wave Water. Test your water every 3–6 months, as municipal sources vary seasonally—never descale if you can prevent scaling.

Should I adjust my tamping pressure if my shot pulls too fast?

No—adjust your grind finer instead of tamping harder. Consistent tamping pressure (ideally with a calibrated tamper) ensures even extraction every time. Changing tamp pressure creates variables that make troubleshooting impossible. If shots run fast, your grind is too coarse; if slow, it's too fine.