A WDT (Weiss Distribution Technique) tool is a device used to evenly distribute coffee grounds in a portafilter before tamping, resulting in a more consistent extraction and improved espresso quality. The best WDT tools are typically made of fine needles or wires that gently break up clumps and evenly distribute the grounds.
Using a WDT tool has several benefits. First, it helps to eliminate channeling, which occurs when water finds a path of least resistance through the coffee puck, resulting in uneven extraction. Second, it helps to improve the consistency of your shots, as the evenly distributed grounds will extract more evenly. Finally, it can help to reduce the amount of sediment in your cup, as the finer particles will be more evenly distributed throughout the puck.
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