diff --git a/code/modules/holiday/halloween/jacqueen.dm b/code/modules/holiday/halloween/jacqueen.dm
index 3cdd4798..5b3b7077 100644
--- a/code/modules/holiday/halloween/jacqueen.dm
+++ b/code/modules/holiday/halloween/jacqueen.dm
@@ -368,7 +368,7 @@
 			C.reagents.add_reagent(/datum/reagent/fermi/eigenstate, 30)
 		if(5)
 			visible_message("<b>[src]</b> waves their arms around, <span class='spooky'>\"A new familiar for me, and you'll see it's thee!\"</span>")
-			C.reagents.add_reagent("secretcatchem", 30)
+			C.reagents.add_reagent(/datum/reagent/fermi/secretcatchem, 30)
 		if(6)
 			visible_message("<b>[src]</b> waves their arms around, <span class='spooky'>\"While you may not be a ghost, for this sheet you'll always be it's host.\"</span>")
 			var/mob/living/carbon/human/H = C
diff --git a/code/modules/mob/living/silicon/robot/robot_modules.dm b/code/modules/mob/living/silicon/robot/robot_modules.dm
index f3ee17a4..b842ba42 100644
--- a/code/modules/mob/living/silicon/robot/robot_modules.dm
+++ b/code/modules/mob/living/silicon/robot/robot_modules.dm
@@ -437,11 +437,11 @@
 
 	var/obj/item/reagent_containers/spray/cyborg_drying/CD = locate(/obj/item/reagent_containers/spray/cyborg_drying) in basic_modules
 	if(CD)
-		CD.reagents.add_reagent("drying_agent", 5 * coeff)
+		CD.reagents.add_reagent(/datum/reagent/drying_agent, 5 * coeff)
 
 	var/obj/item/reagent_containers/spray/cyborg_lube/CL = locate(/obj/item/reagent_containers/spray/cyborg_lube) in emag_modules
 	if(CL)
-		CL.reagents.add_reagent("lube", 2 * coeff)
+		CL.reagents.add_reagent(/datum/reagent/lube, 2 * coeff)
 
 /obj/item/robot_module/clown
 	name = "Clown"
diff --git a/code/modules/mob/living/simple_animal/friendly/mouse.dm b/code/modules/mob/living/simple_animal/friendly/mouse.dm
index cdb299b2..37ecfacf 100644
--- a/code/modules/mob/living/simple_animal/friendly/mouse.dm
+++ b/code/modules/mob/living/simple_animal/friendly/mouse.dm
@@ -176,8 +176,8 @@
 	icon_living = "mouse_plasma"
 	icon_dead = "mouse_plasma"
 	see_in_dark = 12
-	maxHealth = 7
-	health = 7
+	maxHealth = 2
+	health = 2
 	chew_probability = 0
 
 /mob/living/simple_animal/mouse/boommouse/Initialize()
diff --git a/code/modules/mob/living/simple_animal/hostile/floor_cluwne.dm b/code/modules/mob/living/simple_animal/hostile/floor_cluwne.dm
index 9013468f..459747e0 100644
--- a/code/modules/mob/living/simple_animal/hostile/floor_cluwne.dm
+++ b/code/modules/mob/living/simple_animal/hostile/floor_cluwne.dm
@@ -316,9 +316,9 @@ GLOBAL_VAR_INIT(floor_cluwnes, 0)
 				to_chat(H, "<span class='userdanger'>WHAT THE FUCK IS THAT?!</span>")
 				to_chat(H, "<i>.KNOH !nuf hcum os si uoy htiw gniyalP .KNOH KNOH KNOH</i>")
 				H.playsound_local(src,'sound/hallucinations/im_here1.ogg', 25)
-				H.reagents.add_reagent("mindbreaker", 3)
-				H.reagents.add_reagent("laughter", 5)
-				H.reagents.add_reagent("mercury", 3)
+				H.reagents.add_reagent(/datum/reagent/toxin/mindbreaker, 3)
+				H.reagents.add_reagent(/datum/reagent/consumable/laughter, 5)
+				H.reagents.add_reagent(/datum/reagent/mercury, 3)
 				Appear()
 				manifested = FALSE
 				addtimer(CALLBACK(src, /mob/living/simple_animal/hostile/floor_cluwne/.proc/Manifest), 2)
diff --git a/code/modules/pool/pool_main.dm b/code/modules/pool/pool_main.dm
index f5ccc40f..a15f3427 100644
--- a/code/modules/pool/pool_main.dm
+++ b/code/modules/pool/pool_main.dm
@@ -171,7 +171,7 @@
 
 /turf/open/pool/attackby(obj/item/W, mob/living/user)
 	if(istype(W, /obj/item/mop) && filled)
-		W.reagents.add_reagent("water", 5)
+		W.reagents.add_reagent(/datum/reagent/water, 5)
 		to_chat(user, "<span class='notice'>You wet [W] in [src].</span>")
 		playsound(src, 'sound/effects/slosh.ogg', 25, TRUE)
 	else
diff --git a/modular_citadel/code/datums/status_effects/chems.dm b/modular_citadel/code/datums/status_effects/chems.dm
index 9a1a46fe..ef45e07b 100644
--- a/modular_citadel/code/datums/status_effects/chems.dm
+++ b/modular_citadel/code/datums/status_effects/chems.dm
@@ -105,7 +105,7 @@
 		o.add_movespeed_modifier(BREAST_MOVEMENT_SPEED, TRUE, 100, NONE, override = TRUE, multiplicative_slowdown = moveCalc)
 		sizeMoveMod(moveCalc)
 	*/
-	if((B.cached_size) < 40)
+	if((B?.cached_size) < 40)
 		..()
 
 /*