Some coffee rebels say, “I never change it, and I’m fine.” They’re lying to themselves. Or they’re drinking Folgers from 2014. Water is 98% of your coffee. Bad water = bad coffee. Period.
Think of it this way: you wouldn’t bathe in a muddy puddle and then complain your skin feels icky. Your Keurig feels the same way about old, unfiltered water. Respect the machine. It’s doing a thankless job.
How Often Do You Replace Keurig Water Filter | Detroit Chinatown
Quirky Fact #3: The “Vacation Test”
If you leave town for two weeks and come back? Change the filter immediately. Stagnant water in the reservoir makes filters go sour fast. It’s like house-sitting for a grumpy fish tank. Don’t trust it.
Also, never rinse a used filter under the tap and think you’re clever. That’s like shaking a dirty sock and calling it clean. Filters absorb stuff. You can’t wash out the funk.