A matcha whisk (chasen) should be cleaned gently with warm water only, right after you finish your bowl of matcha to prevent staining and mold.

Quick Scoop

  • Use only warm water, never soap or a dishwasher, because detergents and harsh cleaning damage the bamboo and can leave off‑flavors in your tea.
  • Rinse or briefly soak the whisk immediately after use to remove matcha residue and keep the tines flexible and less prone to breakage.
  • Let it air‑dry completely in an open area, ideally on a whisk holder, to prevent mold in the handle and help it keep its shape.

Step‑by‑step cleaning

  1. Fill a bowl (or your matcha bowl) with warm, clean water.
  1. Swish the whisk in the water as if whisking matcha, until all visible green residue loosens.
  1. If needed, run warm water over the tines, pointing them downward so water doesn’t pool in the neck.
  1. Gently inspect with your fingers; remove any remaining clumps without bending the tines.
  1. Shake off excess water and place the whisk upright or on a whisk holder in a well‑ventilated spot to dry.

What to avoid

  • No dish soap or cleaners: they can soak into bamboo and affect taste, and frequent use can weaken the tines.
  • No dishwasher, soaking for hours, or scrubbing with abrasive pads, which can warp or snap the tines.
  • Avoid storing it damp in closed cupboards or jars, since that’s when mold and musty smells tend to appear.

Extra care and replacement

  • Before first use (or occasionally), a short soak in warm water helps the tines open up and become more flexible.
  • A whisk holder can help maintain the rounded shape and extend lifespan, but very worn, splayed, or moldy whisks are usually better replaced.

Information gathered from public forums or data available on the internet and portrayed here.