Tip: Get the donor to wash their hands before a drug test

Bleach, Drano powder, and pool cleaning chemicals are all oxidants and can be used to adulterate a drug test.

After you have asked the person to:

  • remove shoes and outer clothing, and
  • pat themselves down

… get them to wash their hands as well with soap and water, taking care that they wash under the fingernails.

This will prevent any chemicals being smuggled in and dropped into the drug test.