diff --git a/src/game/GameController.cpp b/src/game/GameController.cpp
index e56ae50f9..07d2e63c2 100644
--- a/src/game/GameController.cpp
+++ b/src/game/GameController.cpp
@@ -702,7 +702,15 @@ void GameController::Exit()
 
 void GameController::ResetAir()
 {
-	gameModel->GetSimulation()->air->Clear();
+	Simulation * sim = gameModel->GetSimulation();
+	sim->air->Clear();
+	for (int i = 0; i < NPART; i++)
+	{
+		if (sim->parts[i].type == PT_QRTZ || sim->parts[i].type == PT_GLAS)
+		{
+			sim->parts[i].pavg[0] = sim->parts[i].pavg[1] = 0;
+		}
+	}
 }
 
 void GameController::ResetSpark()
diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp
index 21f810938..afb50c57f 100644
--- a/src/simulation/Simulation.cpp
+++ b/src/simulation/Simulation.cpp
@@ -136,6 +136,10 @@ int Simulation::Load(int fullX, int fullY, GameSave * save)
 				}
 			}
 		}
+		if (parts[i].pavg[0] || parts[i].pavg[1])
+		{
+			parts[i].pavg[0] = parts[i].pavg[1] = 0;
+		}
 	}
 	parts_lastActiveIndex = NPART-1;
 	force_stacking_check = 1;