One of the awesome things about the AeroPress and S Filter combo is the fact that it's so easy to clean. Seriously, just pull off the filter, pop out the grounds, and rinse the whole shebang in hot water (if you're feeling extra clean, you might use dish soap and hot water).
But what do you do when you've been using your majestic duo for a while and you experience build up? Or you're rushing out the door and you forget and leave the whole thing intact and unwashed for a week long vacation? (What? It happens.)
Coffee buildup (aka that oily residue of particles that your grinds leave behind) can be a beast to remove. Fortunately, it takes a lot of cups of coffee (and many mornings of rinsing without soap) to build up to the point that you'll even notice it.
When it does start to get bad, it looks like this:
So what do you do when you want to make your S Filter look shiny and new? Well, coffee buildup is such a pervasive problem that there's a whole industry of cleaning products specifically meant for cleaning your coffee gear (of those, our favorite is Urnex Full Circle). But do you have professional coffee soap in your kitchen? Yeah, I thought so.
Enter the wonder that is baking soda and Dawn blue dish soap.
Quick note before we go further: this only works with the blue version of Dawn. Google it and you'll see how beloved the blue version is by eco-rescuers and cloth diapering families everywhere. Those people know about getting messy things clean.
An S Filter, preferably well-used
A pinch of baking soda
A dab of Dawn blue dish soap
(The pinch and the dab should be roughly the same size.)
Take your spotty S Filter and add a pinch of baking soda and a dab of the Dawn blue dish soap on top. Now rub them together like you're Scrooge McDuck and it's a gold coin. Rinse it off when you feel like being done.
Depending on how much coffee buildup you're dealing with, you may have to rinse and repeat this a couple times. I also use either my fingernail or a teeny tiny scrub brush (like a soft bristled toothbrush) to get along the edges.
The results? A bright and shiny clean S Filter just waiting for you to deliciously muck it all up again.