Keeping your coffee maker clean isn’t just about better-tasting coffee; it’s about hygiene and longevity. Bacteria, mold, and mineral deposits build up over time, impacting flavor and even potentially harboring pests. While many cleaning methods exist—from vinegar to specialized cleaners—finding the best one requires real-world testing. I put five popular methods head-to-head, using secondhand coffee makers in varying states of disrepair, to see which truly delivers.
The Testing Process: Real Machines, Real Results
I sourced five used drip coffee machines from local thrift stores, ensuring they were all similarly dirty before starting. Then, I compared four leading coffee maker cleaners alongside the classic vinegar solution. The goal was simple: identify the most effective and straightforward cleaning method. The results? All five methods work remarkably well. There wasn’t a single clear loser, but some approaches stood out for ease of use and effectiveness.
Method Breakdown: What Works, and Why
Here’s a detailed look at each method, along with my findings:
Vinegar Solution
The most time-tested method involves filling the reservoir with equal parts white vinegar and water, running a brew cycle halfway, pausing for 30-60 minutes, completing the cycle, and then flushing with two pots of clean water. Vinegar’s acidity breaks down mineral deposits and kills some bacteria, but it leaves behind a lingering odor. Despite the smell, this method delivers a clean machine and uses a common household product.
Affresh Coffee Maker Cleaner
Affresh tablets dissolve in water, then run through two brew cycles, followed by a clean water flush. These tablets fizz upon contact with water and break down quickly, but don’t dissolve completely. The cleaning process is simple and effective. A Swedish dishcloth easily wiped away the oily coating from the reservoir.
Dezcal Descaler
Dezcal, from Urnex (a brand favored by professional baristas), comes in powder or liquid form. The powder dissolves in warm water and runs through one brew cycle, followed by two clean water cycles. This method is non-toxic and highly effective. The first brew produces murky water, but the third cycle yields crystal-clear results.
Impresa Descaler
This method involves pouring half a bottle of Impresa into the reservoir, topping it with water, and running a brew cycle. The mixture bubbles vigorously, but cleans effectively. The reservoir was sparkling clean after just one cycle, with a final flush removing all residue.
Biocaf
Biocaf granules dissolve in warm water and run through three brew cycles (one with the cleaner, two with clean water). Made from 100% citric acid, it’s a powerful antibacterial and descaling agent. It’s pre-measured, making the process quick and easy, and the water clears with each cycle.
The Verdict: Which Method Wins?
While all methods cleaned effectively, Biocaf stood out for its convenience. The pre-measured granules simplified the process without sacrificing cleaning power. Vinegar remains a viable option for budget-conscious users, while Dezcal offers a professional-grade solution. Ultimately, the best method is the one you’ll actually use consistently.
Regular cleaning—every few months—is more important than chasing the “perfect” method. Whether you choose vinegar, a specialty cleaner, or Biocaf, keeping your coffee maker clean ensures a better brew and a healthier kitchen.
