You can buy the flannel coffee filters in most grocery stores in Costa Rica, or you can make your own out of cotton flannel cloth. For best results, you should always start with dry filter and rinse it after use with just clean water. Never wash your filter with with soap or detergent because it will leave an aftertaste in the coffee. The filter will stain a coffee color, but this won't affect the taste in the least. After time, the oils from the coffee beans will build up on your filter. You can dissolve the oil by scrubbing the filter with salt. I prefer to use a course ground kosher or sea salt. Rinse the filter well to remove all of the salt before you use it again to make coffee.
John and I have three Chorreadors, one stays in our kitchen, one is used at John's office, and the third stays with our camping gear. Nothing beats the taste of fresh "Café Chorreado" with a tent side breakfast "en el Campo".
For instructions on how to make your own Chorredor de Café go to this link Duck Runner Resources
Originally posted 3/10/08