One year I was gone for a couple months. I turned off the AC, and the house got pretty humid. One thing I noticed when I came back was that some of our coffee filters that were left out on the counter stuck together, and the coffee seemed just a touch off.
Humidity can affect coffee filters in a few ways. High humidity can cause coffee filters to absorb more moisture and become less effective. This can cause the filter to clog more easily, resulting in a slower brew and a weaker cup of coffee. Additionally, the excess moisture in the filter can cause the coffee grounds to expand, making it more difficult for the water to pass through the filter.
Low humidity, on the other hand, can cause the coffee filters to dry out, becoming brittle and more likely to break or tear. This can result in coffee grounds and sediment making their way into your final brew, making it taste gritty and unpleasant.
To avoid these issues, it’s best to store coffee filters in a cool, dry place. If the filters are stored in a humid environment, it’s recommended to put the filters in an airtight container and to use them as soon as possible.