The WDT Tool
WDT, or Weiss Distribution Technique, is a method of puck preparation that aims to evenly distribute coffee grounds in your portafilter, providing a more uniform and TASTY extraction.
The thin wires of the tool are used to rake the grounds before tamping, which breaks up clumps that can be left behind from your grinder. Left untouched, these clumps can cause uneven pockets or gaps in the tamped coffee bed, which typically leads to channeling and spurting during extraction. Not only does channeling and spurting cause a huge mess, but even worse, these are indications that your coffee is being extracted unevenly, leaving you with undesirable flavors in your cup.
When used correctly, a WDT tool can help ensure that your grounds are consistent, clump free, and are extracting all of the lovely flavors your coffee has to offer.