How Do I Clean A Flask?

  1. ngureco profile image81
    ngurecoposted 6 years ago

    How Do I Clean A Flask?

    How do I clean a flask without breaking the glass inside? The glass inside has brown stains that may be difficult to remove just by rinsing with water.

  2. profile image0
    Giselle Maineposted 6 years ago

    This is what I would do.  First get a bottle brush (usually available in baby aisle or houseware aisle): 1. Fill the flask with water containing some dishwash liquid.  Leave overnight, empty, rinse.  2.  Fill the flask with diluted vinegar, leave overnight.  3.  Empty out some of the vinegar, use the bottle brush to scrub the flask as best as possible.  Empty, rinse. Try these steps 1-3 (a couple of times if necessary).