Required Cleanup of ROOT::Math::Minimizer from Factory?

Hi, I am using code that is following the example at the bottom of this page:
http://root.cern.ch/drupal/content/numerical-minimization#multidim_minim

I am wondering, does the user need to manually delete the Minimizer object, or does the Factory keep track of it somehow? If we need to delete it, could a note be added to the example page and to the documentation for ROOT::Math::factory::CreateMinimizer?

Jean-François