diff --git a/src/LabelTrack.cpp b/src/LabelTrack.cpp
index e0bae7f6e..2f7cb3246 100644
--- a/src/LabelTrack.cpp
+++ b/src/LabelTrack.cpp
@@ -2740,7 +2740,8 @@ void LabelTrack::CreateCustomGlyphs()
          // Create the icon from the tweaked spec.
          mBoundaryGlyphs[index] = wxBitmap(XmpBmp);
          // Create the mask
-         mBoundaryGlyphs[index].SetMask(new wxMask(mBoundaryGlyphs[index], wxColour(192, 192, 192)));
+         // SetMask takes ownership
+         mBoundaryGlyphs[index].SetMask(safenew wxMask(mBoundaryGlyphs[index], wxColour(192, 192, 192)));
       }
    }
 
diff --git a/src/Menus.cpp b/src/Menus.cpp
index cb548d5e1..8b87732e0 100644
--- a/src/Menus.cpp
+++ b/src/Menus.cpp
@@ -5370,7 +5370,7 @@ void AudacityProject::OnShowClipping()
 void AudacityProject::OnHistory()
 {
    if (!mHistoryWindow)
-      mHistoryWindow = new HistoryWindow(this, GetUndoManager());
+      mHistoryWindow = safenew HistoryWindow(this, GetUndoManager());
    mHistoryWindow->Show();
    mHistoryWindow->Raise();
    mHistoryWindow->UpdateDisplay();
@@ -5405,7 +5405,7 @@ void AudacityProject::OnPlotSpectrum()
       where.x = 150;
       where.y = 150;
 
-      mFreqWindow = new FreqWindow(this, -1, _("Frequency Analysis"), where);
+      mFreqWindow = safenew FreqWindow(this, -1, _("Frequency Analysis"), where);
    }
 
    mFreqWindow->Show(true);
@@ -5422,7 +5422,7 @@ void AudacityProject::OnContrast()
       where.x = 150;
       where.y = 150;
 
-      mContrastDialog = new ContrastDialog(this, -1, _("Contrast Analysis (WCAG 2 compliance)"), where);
+      mContrastDialog = safenew ContrastDialog(this, -1, _("Contrast Analysis (WCAG 2 compliance)"), where);
    }
 
    mContrastDialog->CentreOnParent();
diff --git a/src/Project.cpp b/src/Project.cpp
index 793e0d8c8..3545207f9 100644
--- a/src/Project.cpp
+++ b/src/Project.cpp
@@ -2033,8 +2033,8 @@ void AudacityProject::OnShow(wxShowEvent & event)
    // this is a pure wxWidgets event (no GDK event behind it) and that it
    // therefore isn't processed within the YieldFor(..) of the clipboard
    // operations (workaround for Debian bug #765341).
-   wxSizeEvent *sizeEvent = new wxSizeEvent(GetSize());
-   GetEventHandler()->QueueEvent(sizeEvent);
+   // QueueEvent() will take ownership of the event
+   GetEventHandler()->QueueEvent(safenew wxSizeEvent(GetSize()));
 
    // Further processing by default handlers
    event.Skip();
diff --git a/src/ShuttleGui.cpp b/src/ShuttleGui.cpp
index 0103d2e2b..9b149d7dd 100644
--- a/src/ShuttleGui.cpp
+++ b/src/ShuttleGui.cpp
@@ -2052,7 +2052,7 @@ GuiWaveTrack * ShuttleGui::AddGuiWaveTrack( const wxString & WXUNUSED(Name))
 //      return wxDynamicCast(wxWindow::FindWindowById( miId, mpDlg), GuiWaveTrack);
    GuiWaveTrack * pGuiWaveTrack;
    miProp=1;
-   mpWind = pGuiWaveTrack = new GuiWaveTrack(mpParent, miId, Name);
+   mpWind = pGuiWaveTrack = safenew GuiWaveTrack(mpParent, miId, Name);
    mpWind->SetMinSize(wxSize(100,50));
    UpdateSizers();
    return pGuiWaveTrack;
@@ -2096,7 +2096,7 @@ AttachableScrollBar * ShuttleGui::AddAttachableScrollBar( long style )
 //      return wxDynamicCast(wxWindow::FindWindowById( miId, mpDlg), AttachableScrollBar);
    AttachableScrollBar * pAttachableScrollBar;
    miProp=0;
-   mpWind = pAttachableScrollBar = new AttachableScrollBar(
+   mpWind = pAttachableScrollBar = safenew AttachableScrollBar(
       mpParent,
       miId,
       wxDefaultPosition,
diff --git a/src/TimerRecordDialog.cpp b/src/TimerRecordDialog.cpp
index ff0579959..ceac1476c 100644
--- a/src/TimerRecordDialog.cpp
+++ b/src/TimerRecordDialog.cpp
@@ -804,7 +804,7 @@ void TimerRecordDialog::PopulateOrExchange(ShuttleGui& S)
          S.StartStatic(_("Start Date and Time"), true);
          {
             m_pDatePickerCtrl_Start =
-               new wxDatePickerCtrl(this, // wxWindow *parent,
+               safenew wxDatePickerCtrl(this, // wxWindow *parent,
                ID_DATEPICKER_START, // wxWindowID id,
                m_DateTime_Start); // const wxDateTime& dt = wxDefaultDateTime,
             // const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize, long style = wxDP_DEFAULT | wxDP_SHOWCENTURY, const wxValidator& validator = wxDefaultValidator, const wxString& name = "datectrl")
@@ -815,7 +815,7 @@ void TimerRecordDialog::PopulateOrExchange(ShuttleGui& S)
 #endif
             S.AddWindow(m_pDatePickerCtrl_Start);
 
-            m_pTimeTextCtrl_Start = new NumericTextCtrl(
+            m_pTimeTextCtrl_Start = safenew NumericTextCtrl(
                NumericConverter::TIME, this, ID_TIMETEXT_START);
             m_pTimeTextCtrl_Start->SetName(_("Start Time"));
             m_pTimeTextCtrl_Start->SetFormatString(strFormat);
@@ -829,7 +829,7 @@ void TimerRecordDialog::PopulateOrExchange(ShuttleGui& S)
          S.StartStatic(_("End Date and Time"), true);
          {
             m_pDatePickerCtrl_End =
-               new wxDatePickerCtrl(this, // wxWindow *parent,
+               safenew wxDatePickerCtrl(this, // wxWindow *parent,
                ID_DATEPICKER_END, // wxWindowID id,
                m_DateTime_End); // const wxDateTime& dt = wxDefaultDateTime,
             // const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize, long style = wxDP_DEFAULT | wxDP_SHOWCENTURY, const wxValidator& validator = wxDefaultValidator, const wxString& name = "datectrl")
@@ -840,7 +840,7 @@ void TimerRecordDialog::PopulateOrExchange(ShuttleGui& S)
 #endif
             S.AddWindow(m_pDatePickerCtrl_End);
 
-            m_pTimeTextCtrl_End = new NumericTextCtrl(
+            m_pTimeTextCtrl_End = safenew NumericTextCtrl(
                NumericConverter::TIME, this, ID_TIMETEXT_END);
             m_pTimeTextCtrl_End->SetName(_("End Time"));
             m_pTimeTextCtrl_End->SetFormatString(strFormat);
@@ -861,7 +861,7 @@ void TimerRecordDialog::PopulateOrExchange(ShuttleGui& S)
             * seconds.
             */
             wxString strFormat1 = _("099 days 024 h 060 m 060 s");
-            m_pTimeTextCtrl_Duration = new NumericTextCtrl(NumericConverter::TIME, this, ID_TIMETEXT_DURATION);
+            m_pTimeTextCtrl_Duration = safenew NumericTextCtrl(NumericConverter::TIME, this, ID_TIMETEXT_DURATION);
             m_pTimeTextCtrl_Duration->SetName(_("Duration"));
             m_pTimeTextCtrl_Duration->SetFormatString(strFormat1);
             m_pTimeTextCtrl_Duration->SetValue(m_TimeSpan_Duration.GetSeconds().ToDouble());
diff --git a/src/TrackPanel.h b/src/TrackPanel.h
index bee35c3ac..2bef7e17d 100644
--- a/src/TrackPanel.h
+++ b/src/TrackPanel.h
@@ -556,8 +556,8 @@ protected:
        // (no GDK event behind it) and that it therefore isn't processed
        // within the YieldFor(..) of the clipboard operations (workaround
        // for Debian bug #765341).
-       wxTimerEvent *event = new wxTimerEvent(*this);
-       parent->GetEventHandler()->QueueEvent(event);
+       // QueueEvent() will take ownership of the event
+       parent->GetEventHandler()->QueueEvent(safenew wxTimerEvent(*this));
      }
      TrackPanel *parent;
    } mTimer;
diff --git a/src/toolbars/ToolBar.cpp b/src/toolbars/ToolBar.cpp
index 32940cf26..63615c9a6 100644
--- a/src/toolbars/ToolBar.cpp
+++ b/src/toolbars/ToolBar.cpp
@@ -758,7 +758,7 @@ AButton * ToolBar::MakeButton(wxWindow *parent,
    wxImagePtr disable2   (OverlayImage(eUp,     eDisabled, xoff, yoff));
 
    AButton * button =
-      new AButton(parent, id, placement, size, *up2, *hilite2, *down2,
+      safenew AButton(parent, id, placement, size, *up2, *hilite2, *down2,
             *disable2, processdownevents);
 
    return button;
diff --git a/src/toolbars/ToolManager.cpp b/src/toolbars/ToolManager.cpp
index 2a7986a7f..d7bc77099 100644
--- a/src/toolbars/ToolManager.cpp
+++ b/src/toolbars/ToolManager.cpp
@@ -1085,6 +1085,7 @@ void ToolManager::OnMouse( wxMouseEvent & event )
 
          // Done with the floater
          mDragWindow->Destroy();
+         mDragWindow = nullptr;
          mDragBar->Refresh(false);
       }
       else
@@ -1335,7 +1336,7 @@ void ToolManager::OnGrabber( GrabberEvent & event )
       mDragBar->SetPositioned();
 
       // Construct a NEW floater
-      mDragWindow = new ToolFrame( mParent, this, mDragBar, mp );
+      mDragWindow = safenew ToolFrame( mParent, this, mDragBar, mp );
 
       // Make sure the ferry is visible
       mDragWindow->Show();
@@ -1377,6 +1378,7 @@ void ToolManager::HandleEscapeKey()
          // Done with the floater
          mDragWindow->ClearBar();
          mDragWindow->Destroy();
+         mDragWindow = nullptr;
          mDragBar->Refresh(false);
       }
       else {
diff --git a/src/widgets/ASlider.cpp b/src/widgets/ASlider.cpp
index 348fbf77d..beaaaebc9 100644
--- a/src/widgets/ASlider.cpp
+++ b/src/widgets/ASlider.cpp
@@ -705,7 +705,8 @@ void LWSlider::Draw(wxDC & paintDC)
 
 #if !defined(__WXMAC__)
    // Now create and set the mask
-   mThumbBitmap->SetMask(new wxMask(*mThumbBitmap, transparentColour));
+   // SetMask takes ownership
+   mThumbBitmap->SetMask(safenew wxMask(*mThumbBitmap, transparentColour));
 #endif
 
    //
@@ -884,7 +885,8 @@ void LWSlider::Draw(wxDC & paintDC)
    dc.SelectObject(wxNullBitmap);
 
 #if !defined(__WXMAC__)
-   mBitmap->SetMask(new wxMask(*mBitmap, transparentColour));
+   // SetMask takes ownership
+   mBitmap->SetMask(safenew wxMask(*mBitmap, transparentColour));
 #endif
 }
 
diff --git a/src/widgets/ErrorDialog.cpp b/src/widgets/ErrorDialog.cpp
index 34a9cb628..0cb633142 100644
--- a/src/widgets/ErrorDialog.cpp
+++ b/src/widgets/ErrorDialog.cpp
@@ -184,11 +184,13 @@ void ShowModelessErrorDialog(wxWindow *parent,
                              const wxString &helpURL,
                              const bool Close)
 {
-   ErrorDialog *dlog = new ErrorDialog(parent, dlogTitle, message, helpURL, Close, false);
+   ErrorDialog *dlog = safenew ErrorDialog(parent, dlogTitle, message, helpURL, Close, false);
    dlog->CentreOnParent();
    dlog->Show();
    // ANSWER-ME: Vigilant Sentry flags this method as not deleting dlog, so a mem leak.
    // ANSWER-ME: This is unused. Delete it or are there plans for it?
+   // PRL: answer is that the parent window guarantees destruction of the dialog
+   // but in practice Destroy() in OnOK does that
 }
 
 void ShowAliasMissingDialog(AudacityProject *parent,
@@ -197,7 +199,7 @@ void ShowAliasMissingDialog(AudacityProject *parent,
                             const wxString &helpURL,
                             const bool Close)
 {
-   ErrorDialog *dlog = new AliasedFileMissingDialog(parent, dlogTitle, message, helpURL, Close, false);
+   ErrorDialog *dlog = safenew AliasedFileMissingDialog(parent, dlogTitle, message, helpURL, Close, false);
    // Don't center because in many cases (effect, export, etc) there will be a progress bar in the center that blocks this.
    // instead put it just above or on the top of the project.
    wxPoint point;
@@ -214,4 +216,6 @@ void ShowAliasMissingDialog(AudacityProject *parent,
    // stop playback AND read dialog's instructions.
    dlog->Show();
    // ANSWER-ME: Vigilant Sentry flags this method as not deleting dlog, so a mem leak.
+   // PRL: answer is that the parent window guarantees destruction of the dialog
+   // but in practice Destroy() in OnOK does that
 }
diff --git a/src/widgets/ExpandingToolBar.cpp b/src/widgets/ExpandingToolBar.cpp
index 1765eca28..031d1d554 100644
--- a/src/widgets/ExpandingToolBar.cpp
+++ b/src/widgets/ExpandingToolBar.cpp
@@ -152,7 +152,7 @@ ExpandingToolBar::ExpandingToolBar(wxWindow* parent,
    wxColour magicColor = wxColour(0, 255, 255);
    ImageArray fourStates = ImageRoll::SplitV(hbar, magicColor);
 
-   mToggleButton = new AButton(this, kToggleButtonID,
+   mToggleButton = safenew AButton(this, kToggleButtonID,
                                wxDefaultPosition, wxDefaultSize,
                                ImageRoll(ImageRoll::HorizontalRoll,
                                          fourStates[0], magicColor),