diff --git a/effects/desktopgrid/desktopgrid.h b/effects/desktopgrid/desktopgrid.h
--- a/effects/desktopgrid/desktopgrid.h
+++ b/effects/desktopgrid/desktopgrid.h
@@ -175,9 +175,6 @@
     // Shortcut - needed to toggle the effect
     QList<QKeySequence> shortcut;
 
-    // State of WindowForceBlurRole before this effect
-    QMap <EffectWindow*, bool> m_windowForceBlurRoleState;
-
     PresentWindowsEffectProxy* m_proxy;
     QList<WindowMotionManager> m_managers;
     bool m_usePresentWindows;
diff --git a/effects/desktopgrid/desktopgrid.cpp b/effects/desktopgrid/desktopgrid.cpp
--- a/effects/desktopgrid/desktopgrid.cpp
+++ b/effects/desktopgrid/desktopgrid.cpp
@@ -164,7 +164,6 @@
     }
 
     for (auto const &w : effects->stackingOrder()) {
-        m_windowForceBlurRoleState[w] = w->data(WindowForceBlurRole).toBool();
         w->setData(WindowForceBlurRole, QVariant(true));
     }
 
@@ -257,7 +256,7 @@
     }
 
     for (auto &w : effects->stackingOrder()) {
-        w->setData(WindowForceBlurRole, m_windowForceBlurRoleState.value(w, false));
+        w->setData(WindowForceBlurRole, QVariant());
     }
 
     effects->postPaintScreen();
diff --git a/effects/maximize/package/contents/code/maximize.js b/effects/maximize/package/contents/code/maximize.js
--- a/effects/maximize/package/contents/code/maximize.js
+++ b/effects/maximize/package/contents/code/maximize.js
@@ -19,7 +19,6 @@
 /*global effect, effects, animate, animationTime, Effect*/
 var maximizeEffect = {
     duration: animationTime(250),
-    windowForceBlurRoleState: false,
     loadConfig: function () {
         "use strict";
         maximizeEffect.duration = animationTime(250);
@@ -29,7 +28,6 @@
         if (!window.oldGeometry) {
             return;
         }
-        maximizeEffect.windowForceBlurRoleState = window.data(Effect.WindowForceBlurRole);
         window.setData(Effect.WindowForceBlurRole, true);
         var oldGeometry, newGeometry;
         oldGeometry = window.oldGeometry;
@@ -76,7 +74,7 @@
         }
     },
     restoreForceBlurState: function(window) {
-        window.setData(Effect.WindowForceBlurRole, maximizeEffect.windowForceBlurRoleState);
+        window.setData(Effect.WindowForceBlurRole, null);
     },
     geometryChange: function (window, oldGeometry) {
         "use strict";
diff --git a/effects/presentwindows/presentwindows.h b/effects/presentwindows/presentwindows.h
--- a/effects/presentwindows/presentwindows.h
+++ b/effects/presentwindows/presentwindows.h
@@ -309,9 +309,6 @@
     // Grid layout info
     QList<GridSize> m_gridSizes;
 
-    // State of WindowForceBlurRole before this effect
-    QMap <EffectWindow*, bool> m_windowForceBlurRoleState;
-
     // Filter box
     EffectFrame* m_filterFrame;
     QString m_windowFilter;
diff --git a/effects/presentwindows/presentwindows.cpp b/effects/presentwindows/presentwindows.cpp
--- a/effects/presentwindows/presentwindows.cpp
+++ b/effects/presentwindows/presentwindows.cpp
@@ -244,8 +244,8 @@
         m_windowData.clear();
 
         foreach (EffectWindow * w, effects->stackingOrder()) {
-            w->setData(WindowForceBlurRole, QVariant(m_windowForceBlurRoleState.value(w, false)));
-            w->setData(WindowForceBackgroundContrastRole, QVariant(false));
+            w->setData(WindowForceBlurRole, QVariant());
+            w->setData(WindowForceBackgroundContrastRole, QVariant());
         }
         effects->setActiveFullScreenEffect(NULL);
         effects->addRepaintFull();
@@ -1584,7 +1584,6 @@
         setHighlightedWindow(effects->activeWindow());
 
         foreach (EffectWindow * w, effects->stackingOrder()) {
-            m_windowForceBlurRoleState[w] = w->data(WindowForceBlurRole).toBool();
             w->setData(WindowForceBlurRole, QVariant(true));
             w->setData(WindowForceBackgroundContrastRole, QVariant(true));
         }
diff --git a/effects/slideback/slideback.h b/effects/slideback/slideback.h
--- a/effects/slideback/slideback.h
+++ b/effects/slideback/slideback.h
@@ -66,8 +66,6 @@
     int m_tabboxActive;
     QList <QRegion> clippedRegions;
 
-    QMap <EffectWindow*, bool> m_windowForceBlurRoleState;
-
     QRect getSlideDestination(const QRect &windowUnderGeometry, const QRect &windowOverGeometry);
     bool isWindowUsable(EffectWindow *w);
     bool intersects(EffectWindow *windowUnder, const QRect &windowOverGeometry);
diff --git a/effects/slideback/slideback.cpp b/effects/slideback/slideback.cpp
--- a/effects/slideback/slideback.cpp
+++ b/effects/slideback/slideback.cpp
@@ -151,7 +151,6 @@
     }
 
     for (auto const &w : effects->stackingOrder()) {
-        m_windowForceBlurRoleState[w] = w->data(WindowForceBlurRole).toBool();
         w->setData(WindowForceBlurRole, QVariant(true));
     }
 
@@ -165,7 +164,7 @@
     }
 
     for (auto &w : effects->stackingOrder()) {
-        w->setData(WindowForceBlurRole, m_windowForceBlurRoleState.value(w, false));
+        w->setData(WindowForceBlurRole, QVariant());
     }
 
     effects->postPaintScreen();