Significant cell death xkcd by Randall Munroe (CC BY-NC) Bleach also works. And high concentrations of ethanol (works for humans too). Also, just leaving the petri dish out on your lab bench to desiccate. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Like this:Like Loading...