diff --git a/code/game/machinery/Sleeper.dm b/code/game/machinery/Sleeper.dm
index 709677b5fd7..4fb316a8410 100644
--- a/code/game/machinery/Sleeper.dm
+++ b/code/game/machinery/Sleeper.dm
@@ -306,8 +306,7 @@
 	if(chem in spray_chems)
 		var/datum/reagents/holder = new()
 		holder.add_reagent(chem_buttons[chem], 10) //I hope this is the correct way to do this.
-		holder.expose(occupant, VAPOR, 0)
-		holder.trans_to(occupant, 10)
+		holder.trans_to(occupant, 10, method = VAPOR)
 		playsound(src.loc, 'sound/effects/spray2.ogg', 50, TRUE, -6)
 		if(user)
 			log_combat(user, occupant, "sprayed [chem] into", addition = "via [src]")
diff --git a/code/game/mecha/equipment/tools/medical_tools.dm b/code/game/mecha/equipment/tools/medical_tools.dm
index d1ba0ebf129..066c2568554 100644
--- a/code/game/mecha/equipment/tools/medical_tools.dm
+++ b/code/game/mecha/equipment/tools/medical_tools.dm
@@ -331,8 +331,7 @@
 								R += "[A.name] ([num2text(A.volume)]"
 						mechsyringe.icon_state = initial(mechsyringe.icon_state)
 						mechsyringe.icon = initial(mechsyringe.icon)
-						mechsyringe.reagents.expose(M, INJECT)
-						mechsyringe.reagents.trans_to(M, mechsyringe.reagents.total_volume, transfered_by = originaloccupant)
+						mechsyringe.reagents.trans_to(M, mechsyringe.reagents.total_volume, transfered_by = originaloccupant, method = INJECT)
 						M.take_bodypart_damage(2)
 						log_combat(originaloccupant, M, "shot", "syringegun")
 					break
diff --git a/code/game/objects/items/crayons.dm b/code/game/objects/items/crayons.dm
index 4059a05a5f8..7c8e4c064d2 100644
--- a/code/game/objects/items/crayons.dm
+++ b/code/game/objects/items/crayons.dm
@@ -427,8 +427,7 @@
 	if(affected_turfs.len)
 		fraction /= affected_turfs.len
 	for(var/t in affected_turfs)
-		reagents.expose(t, TOUCH, fraction * volume_multiplier)
-		reagents.trans_to(t, ., volume_multiplier, transfered_by = user)
+		reagents.trans_to(t, ., volume_multiplier, transfered_by = user, method = TOUCH)
 	check_empty(user)
 
 /obj/item/toy/crayon/attack(mob/M, mob/user)
@@ -447,9 +446,7 @@
 		var/eaten = use_charges(user, 5, FALSE)
 		if(check_empty(user)) //Prevents divsion by zero
 			return
-		var/fraction = min(eaten / reagents.total_volume, 1)
-		reagents.expose(M, INGEST, fraction * volume_multiplier)
-		reagents.trans_to(M, eaten, volume_multiplier, transfered_by = user)
+		reagents.trans_to(M, eaten, volume_multiplier, transfered_by = user, method = INGEST)
 		// check_empty() is called during afterattack
 	else
 		..()
@@ -673,9 +670,7 @@
 			H.lip_color = paint_color
 			H.update_body()
 		var/used = use_charges(user, 10, FALSE)
-		var/fraction = min(1, used / reagents.maximum_volume)
-		reagents.expose(user, VAPOR, fraction * volume_multiplier)
-		reagents.trans_to(user, used, volume_multiplier, transfered_by = user)
+		reagents.trans_to(user, used, volume_multiplier, transfered_by = user, method = VAPOR)
 
 		return (OXYLOSS)
 
@@ -742,9 +737,7 @@
 			else
 				target.set_opacity(initial(target.opacity))
 		. = use_charges(user, 2)
-		var/fraction = min(1, . / reagents.maximum_volume)
-		reagents.expose(target, TOUCH, fraction * volume_multiplier)
-		reagents.trans_to(target, ., volume_multiplier, transfered_by = user)
+		reagents.trans_to(target, ., volume_multiplier, transfered_by = user, method = VAPOR)
 
 		if(pre_noise || post_noise)
 			playsound(user.loc, 'sound/effects/spray.ogg', 5, TRUE, 5)
diff --git a/code/game/objects/items/tanks/watertank.dm b/code/game/objects/items/tanks/watertank.dm
index 9aa8e286a1b..f037962ff06 100644
--- a/code/game/objects/items/tanks/watertank.dm
+++ b/code/game/objects/items/tanks/watertank.dm
@@ -419,8 +419,7 @@
 		return
 
 	var/used_amount = injection_amount/usage_ratio
-	reagents.expose(user, INJECT,injection_amount,0)
-	reagents.trans_to(user,used_amount,multiplier=usage_ratio)
+	reagents.trans_to(user,used_amount,multiplier=usage_ratio, method = INJECT)
 	update_icon()
 	user.update_inv_back() //for overlays update
 
diff --git a/code/modules/atmospherics/machinery/components/unary_devices/cryo.dm b/code/modules/atmospherics/machinery/components/unary_devices/cryo.dm
index a3baa7e0d7d..c6e8d784d72 100644
--- a/code/modules/atmospherics/machinery/components/unary_devices/cryo.dm
+++ b/code/modules/atmospherics/machinery/components/unary_devices/cryo.dm
@@ -234,8 +234,7 @@
 			mob_occupant.Unconscious((mob_occupant.bodytemperature * unconscious_factor) * 2000)
 		if(beaker)
 			if(reagent_transfer == 0) // Magically transfer reagents. Because cryo magic.
-				beaker.reagents.trans_to(occupant, 1, efficiency * 0.25) // Transfer reagents.
-				beaker.reagents.expose(occupant, VAPOR)
+				beaker.reagents.trans_to(occupant, 1, efficiency * 0.25, method = VAPOR) // Transfer reagents.
 				air1.gases[/datum/gas/oxygen][MOLES] -= max(0,air1.gases[/datum/gas/oxygen][MOLES] - 2 / efficiency) //Let's use gas for this
 				air1.garbage_collect()
 			if(++reagent_transfer >= 10 * efficiency) // Throttle reagent transfer (higher efficiency will transfer the same amount but consume less from the beaker).
diff --git a/code/modules/food_and_drinks/drinks/drinks.dm b/code/modules/food_and_drinks/drinks/drinks.dm
index 8b389098f17..dad0d39e3f4 100644
--- a/code/modules/food_and_drinks/drinks/drinks.dm
+++ b/code/modules/food_and_drinks/drinks/drinks.dm
@@ -47,8 +47,7 @@
 	SEND_SIGNAL(src, COMSIG_DRINK_DRANK, M, user)
 	var/fraction = min(gulp_size/reagents.total_volume, 1)
 	checkLiked(fraction, M)
-	reagents.expose(M, INGEST, fraction)
-	reagents.trans_to(M, gulp_size, transfered_by = user)
+	reagents.trans_to(M, gulp_size, transfered_by = user, method = INGEST)
 	playsound(M.loc,'sound/items/drink.ogg', rand(10,50), TRUE)
 	if(iscarbon(M))
 		var/mob/living/carbon/carbon_drinker = M
diff --git a/code/modules/food_and_drinks/food/condiment.dm b/code/modules/food_and_drinks/food/condiment.dm
index 4dbe65a4175..c70ebc2d300 100644
--- a/code/modules/food_and_drinks/food/condiment.dm
+++ b/code/modules/food_and_drinks/food/condiment.dm
@@ -90,10 +90,7 @@
 		M.visible_message("<span class='warning'>[user] fed [M] from [src].</span>", \
 			"<span class='warning'>[user] fed you from [src].</span>")
 		log_combat(user, M, "fed", reagents.log_list())
-
-	var/fraction = min(10/reagents.total_volume, 1)
-	reagents.expose(M, INGEST, fraction)
-	reagents.trans_to(M, 10, transfered_by = user)
+	reagents.trans_to(M, 10, transfered_by = user, method = INGEST)
 	playsound(M.loc,'sound/items/drink.ogg', rand(10,50), TRUE)
 	return 1
 
diff --git a/code/modules/food_and_drinks/food/snacks_other.dm b/code/modules/food_and_drinks/food/snacks_other.dm
index 06b6bc30e14..b4cace10799 100644
--- a/code/modules/food_and_drinks/food/snacks_other.dm
+++ b/code/modules/food_and_drinks/food/snacks_other.dm
@@ -485,9 +485,7 @@
 		if(iscarbon(loc))
 			var/mob/living/carbon/C = loc
 			if (src == C.wear_mask) // if it's in the human/monkey mouth, transfer reagents to the mob
-				var/fraction = min(REAGENTS_METABOLISM/reagents.total_volume, 1)
-				reagents.expose(C, INGEST, fraction)
-				if(!reagents.trans_to(C, REAGENTS_METABOLISM))
+				if(!reagents.trans_to(C, REAGENTS_METABOLISM, method = INGEST))
 					reagents.remove_any(REAGENTS_METABOLISM)
 				return
 		reagents.remove_any(REAGENTS_METABOLISM)
diff --git a/code/modules/hydroponics/plant_genes.dm b/code/modules/hydroponics/plant_genes.dm
index 59f19869ba5..36e8ec89455 100644
--- a/code/modules/hydroponics/plant_genes.dm
+++ b/code/modules/hydroponics/plant_genes.dm
@@ -456,9 +456,7 @@
 		var/mob/living/L = target
 		if(L.reagents && L.can_inject(null, 0))
 			var/injecting_amount = max(1, G.seed.potency*0.2) // Minimum of 1, max of 20
-			var/fraction = min(injecting_amount/G.reagents.total_volume, 1)
-			G.reagents.expose(L, INJECT, fraction)
-			G.reagents.trans_to(L, injecting_amount)
+			G.reagents.trans_to(L, injecting_amount, method = INJECT)
 			to_chat(target, "<span class='danger'>You are pricked by [G]!</span>")
 			log_combat(G, L, "pricked and attempted to inject reagents from [G] to [L]. Last touched by: [G.fingerprintslast].")
 
diff --git a/code/modules/paperwork/pen.dm b/code/modules/paperwork/pen.dm
index 898c133a8a9..df2acb52b74 100644
--- a/code/modules/paperwork/pen.dm
+++ b/code/modules/paperwork/pen.dm
@@ -181,8 +181,8 @@
 	if(..())
 		if(reagents.total_volume)
 			if(M.reagents)
-				reagents.expose(M, INJECT, reagents.total_volume)
-				reagents.trans_to(M, reagents.total_volume, transfered_by = user)
+
+				reagents.trans_to(M, reagents.total_volume, transfered_by = user, method = INJECT)
 
 
 /obj/item/pen/sleepy/Initialize()
diff --git a/code/modules/projectiles/projectile/bullets/dart_syringe.dm b/code/modules/projectiles/projectile/bullets/dart_syringe.dm
index 5ad3f75bebd..51870d9a20d 100644
--- a/code/modules/projectiles/projectile/bullets/dart_syringe.dm
+++ b/code/modules/projectiles/projectile/bullets/dart_syringe.dm
@@ -15,8 +15,7 @@
 		if(blocked != 100) // not completely blocked
 			if(M.can_inject(null, FALSE, def_zone, piercing)) // Pass the hit zone to see if it can inject by whether it hit the head or the body.
 				..()
-				reagents.expose(M, INJECT)
-				reagents.trans_to(M, reagents.total_volume)
+				reagents.trans_to(M, reagents.total_volume, method = INJECT)
 				return BULLET_ACT_HIT
 			else
 				blocked = 100
diff --git a/code/modules/reagents/reagent_containers/hypospray.dm b/code/modules/reagents/reagent_containers/hypospray.dm
index 6711be55a1e..b151e4ef071 100644
--- a/code/modules/reagents/reagent_containers/hypospray.dm
+++ b/code/modules/reagents/reagent_containers/hypospray.dm
@@ -40,13 +40,14 @@
 		to_chat(M, "<span class='warning'>You feel a tiny prick!</span>")
 		to_chat(user, "<span class='notice'>You inject [M] with [src].</span>")
 		var/fraction = min(amount_per_transfer_from_this/reagents.total_volume, 1)
-		reagents.expose(M, INJECT, fraction)
+
 
 		if(M.reagents)
 			var/trans = 0
 			if(!infinite)
-				trans = reagents.trans_to(M, amount_per_transfer_from_this, transfered_by = user)
+				trans = reagents.trans_to(M, amount_per_transfer_from_this, transfered_by = user, method = INJECT)
 			else
+				reagents.expose(M, INJECT, fraction)
 				trans = reagents.copy_to(M, amount_per_transfer_from_this)
 			to_chat(user, "<span class='notice'>[trans] unit\s injected. [reagents.total_volume] unit\s remaining in [src].</span>")
 			log_combat(user, M, "injected", src, "([contained])")
diff --git a/code/modules/surgery/dental_implant.dm b/code/modules/surgery/dental_implant.dm
index 7986f03b489..6bfe57311ab 100644
--- a/code/modules/surgery/dental_implant.dm
+++ b/code/modules/surgery/dental_implant.dm
@@ -38,7 +38,6 @@
 	to_chat(owner, "<span class='notice'>You grit your teeth and burst the implanted [target.name]!</span>")
 	log_combat(owner, null, "swallowed an implanted pill", target)
 	if(target.reagents.total_volume)
-		target.reagents.expose(owner, INGEST)
-		target.reagents.trans_to(owner, target.reagents.total_volume, transfered_by = owner)
+		target.reagents.trans_to(owner, target.reagents.total_volume, transfered_by = owner, method = INGEST)
 	qdel(target)
 	return TRUE