diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeMachine.java b/packages/SystemUI/src/com/android/systemui/doze/DozeMachine.java
index 18bfd899a4e7f..490890f263aa4 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeMachine.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeMachine.java
@@ -159,6 +159,15 @@ public class DozeMachine {
         mDozeHost = dozeHost;
     }
 
+    /**
+     * Clean ourselves up.
+     */
+    public void destroy() {
+        for (Part part : mParts) {
+            part.destroy();
+        }
+    }
+
     /** Initializes the set of {@link Part}s. Must be called exactly once after construction. */
     public void setParts(Part[] parts) {
         Preconditions.checkState(mParts == null);
@@ -411,6 +420,9 @@ public class DozeMachine {
 
         /** Dump current state. For debugging only. */
         default void dump(PrintWriter pw) {}
+
+        /** Give the Part a chance to clean itself up. */
+        default void destroy() {}
     }
 
     /** A wrapper interface for {@link android.service.dreams.DreamService} */
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java b/packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java
index 700a8611c8bd7..10776c91df843 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java
@@ -163,6 +163,17 @@ public class DozeSensors {
                 });
     }
 
+    /**
+     *  Unregister any sensors.
+     */
+    public void destroy() {
+        // Unregisters everything, which is enough to allow gc.
+        for (TriggerSensor triggerSensor : mSensors) {
+            triggerSensor.setListening(false);
+        }
+        mProximitySensor.pause();
+    }
+
     /**
      * Temporarily disable some sensors to avoid turning on the device while the user is
      * turning it off.
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeService.java b/packages/SystemUI/src/com/android/systemui/doze/DozeService.java
index 7cbbdd783e749..529b016aaca6a 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeService.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeService.java
@@ -65,6 +65,7 @@ public class DozeService extends DreamService
             mPluginManager.removePluginListener(this);
         }
         super.onDestroy();
+        mDozeMachine.destroy();
         mDozeMachine = null;
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java b/packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java
index b3299916356cc..1be4d438683a8 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java
@@ -111,6 +111,11 @@ public class DozeTriggers implements DozeMachine.Part {
         mBroadcastDispatcher = broadcastDispatcher;
     }
 
+    @Override
+    public void destroy() {
+        mDozeSensors.destroy();
+    }
+
     private void onNotification(Runnable onPulseSuppressedListener) {
         if (DozeMachine.DEBUG) {
             Log.d(TAG, "requestNotificationPulse");
diff --git a/packages/SystemUI/tests/src/com/android/systemui/doze/DozeSensorsTest.java b/packages/SystemUI/tests/src/com/android/systemui/doze/DozeSensorsTest.java
index ff03fbae3f3a3..317500cf5b025 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/doze/DozeSensorsTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/doze/DozeSensorsTest.java
@@ -158,6 +158,13 @@ public class DozeSensorsTest extends SysuiTestCase {
         verify(mTriggerSensor).setListening(eq(false));
     }
 
+    @Test
+    public void testDestroy() {
+        mDozeSensors.destroy();
+
+        verify(mTriggerSensor).setListening(false);
+    }
+
     private class TestableDozeSensors extends DozeSensors {
 
         TestableDozeSensors() {