Peek into my cupboards and you’ll be able to tell I drink coffee. My mugs have the stubborn brown stains to prove it. Even worse is the bottom of my Chemex carafe, which builds up an ugly residue that no amount of scrubbing with soap has been able to remove.
Luckily, I found a cheap, quick way to clean away old coffee stains without using any harsh chemicals or having to buy special cleaners. You just need one thing, which you probably already have in your pantry.