diff --git a/includes/powder.h b/includes/powder.h
index 8f1cd56c3..006017e42 100644
--- a/includes/powder.h
+++ b/includes/powder.h
@@ -507,7 +507,7 @@ static const part_type ptypes[PT_NUM] =
 	{"NEUT",	PIXPACK(0x20E0FF),	0.0f,	0.00f * CFDS,	1.00f,	1.00f,	-0.99f,	0.0f,	0.01f,	0.002f	* CFDS,	0,	0,		0,	0,	0,	1,	1,	-1,		SC_NUCLEAR,		R_TEMP+4.0f	+273.15f,	60,		"Neutrons. Interact with matter in odd ways.", ST_GAS, TYPE_ENERGY|PROP_LIFE_DEC|PROP_LIFE_KILL_DEC, &update_NEUT, &graphics_NEUT},
 	{"PLUT",	PIXPACK(0x407020),	0.4f,	0.01f * CFDS,	0.99f,	0.95f,	0.0f,	0.4f,	0.00f,	0.000f	* CFDS,	1,	0,		0,	0,	0,	1,	1,	90,		SC_NUCLEAR,		R_TEMP+4.0f	+273.15f,	251,	"Heavy particles. Fissile. Generates neutrons under pressure.", ST_SOLID, TYPE_PART|PROP_NEUTPENETRATE|PROP_RADIOACTIVE, &update_PLUT, NULL},
 	{"PLNT",	PIXPACK(0x0CAC00),	0.0f,	0.00f * CFDS,	0.95f,	0.00f,	0.0f,	0.0f,	0.00f,	0.000f	* CFDS,	0,	20,		0,	0,	10,	1,	1,	100,	SC_SOLIDS,		R_TEMP+0.0f	+273.15f,	65,		"Plant, drinks water and grows.", ST_SOLID, TYPE_SOLID|PROP_NEUTPENETRATE|PROP_LIFE_DEC, &update_PLNT, NULL},
-	{"ACID",	PIXPACK(0xED55FF),	0.6f,	0.01f * CFDS,	0.98f,	0.95f,	0.0f,	0.1f,	0.00f,	0.000f	* CFDS,	2,	40,		0,	0,	1,	1,	1,	10,		SC_LIQUID,		R_TEMP+0.0f	+273.15f,	34,		"Dissolves almost everything.", ST_LIQUID, TYPE_LIQUID, &update_ACID, &graphics_ACID},
+	{"ACID",	PIXPACK(0xED55FF),	0.6f,	0.01f * CFDS,	0.98f,	0.95f,	0.0f,	0.1f,	0.00f,	0.000f	* CFDS,	2,	40,		0,	0,	1,	1,	1,	10,		SC_LIQUID,		R_TEMP+0.0f	+273.15f,	34,		"Dissolves almost everything.", ST_LIQUID, TYPE_LIQUID|PROP_DEADLY, &update_ACID, &graphics_ACID},
 	{"VOID",	PIXPACK(0x790B0B),	0.0f,	0.00f * CFDS,	1.00f,	0.00f,	0.0f,	0.0f,	0.00f,	-0.0003f* CFDS,	0,	0,		0,	0,	0,	1,	1,	100,	SC_SPECIAL,		R_TEMP+0.0f	+273.15f,	251,	"Hole, will drain away any particles.", ST_SOLID, TYPE_SOLID, NULL, NULL},
 	{"WTRV",	PIXPACK(0xA0A0FF),	1.0f,	0.01f * CFDS,	0.99f,	0.30f,	-0.1f,	-0.1f,	0.75f,	0.0003f	* CFDS,	0,	0,		0,	0,	4,	1,	1,	1,		SC_GAS,			R_TEMP+100.0f+273.15f,	48,		"Steam, heats up air, produced from hot water.", ST_GAS, TYPE_GAS, &update_WTRV, NULL},
 	{"CNCT",	PIXPACK(0xC0C0C0),	0.4f,	0.04f * CFDS,	0.94f,	0.95f,	-0.1f,	0.3f,	0.00f,	0.000f	* CFDS,	1,	0,		0,	2,	2,	1,	1,	55,		SC_POWDERS,		R_TEMP+0.0f	+273.15f,	100,	"Concrete, stronger than stone.", ST_SOLID, TYPE_PART|PROP_HOT_GLOW, NULL, NULL},
diff --git a/src/elements/figh.c b/src/elements/figh.c
index 36cc3929a..284a56c60 100644
--- a/src/elements/figh.c
+++ b/src/elements/figh.c
@@ -45,7 +45,9 @@ int update_FIGH(UPDATE_FUNC_ARGS)
 		case 1:
 			if ((pow(tarx-x, 2) + pow(tary-y, 2))<600)
 			{
-				if (figh->elem == PT_FIRE || figh->elem == PT_LIGH)
+				if (figh->elem == PT_LIGH || figh->elem == PT_NEUT 
+						|| ptypes[figh->elem].properties&(PROP_DEADLY|PROP_RADIOACTIVE) 
+						|| ptypes[figh->elem].heat>=323 || ptypes[figh->elem].heat<=243)
 					figh->comm = (int)figh->comm | 0x08;
 			}
 			else
diff --git a/src/elements/stkm.c b/src/elements/stkm.c
index e8a12411f..be3506d9d 100644
--- a/src/elements/stkm.c
+++ b/src/elements/stkm.c
@@ -426,14 +426,18 @@ void STKM_interact(playerst* playerp, int i, int x, int y)
 			parts[i].life -= 2;
 			playerp->accs[3] -= 1;
 		}
-
-		if ((r&0xFF)==PT_ACID)  //If on acid
-			parts[i].life -= 5;
-
-		if ((r&0xFF)==PT_PLUT)  //If on plut
-			parts[i].life -= 1;
 			
 		if (ptypes[r&0xFF].properties&PROP_DEADLY)
+			switch (r&0xFF)
+			{
+				case PT_ACID:
+					parts[i].life -= 5;
+					break;
+				default:
+					parts[i].life -= 1;
+			}
+
+		if (ptypes[r&0xFF].properties&PROP_RADIOACTIVE)
 			parts[i].life -= 1;
 
 		if ((r&0xFF)==PT_PRTI && parts[i].type)