Removes a bunch of sleeps/spawns and makes a few booleans defines

code/modules/reagents/chemistry/machinery/chem_master.dm

@@ -57,8 +57,7 @@
 	if(powered())
 		stat &= ~NOPOWER
 	else
-		spawn(rand(0, 15))
-			stat |= NOPOWER
+		stat |= NOPOWER
 
 /obj/machinery/chem_master/attackby(obj/item/I, mob/user, params)
 	if(default_deconstruction_screwdriver(user, "mixer0_nopower", "mixer0", I))

code/modules/reagents/reagent_containers/glass.dm

@@ -49,8 +49,7 @@
 				to_chat(user, "<span class='notice'>You swallow a gulp of [src].</span>")
 			var/fraction = min(5/reagents.total_volume, 1)
 			reagents.reaction(M, INGEST, fraction)
-			spawn(5)
-				reagents.trans_to(M, 5)
+			addtimer(CALLBACK(reagents, /datum/reagents.proc/trans_to, M, 5), 5)
 			playsound(M.loc,'sound/items/drink.ogg', rand(10,50), 1)
 
 /obj/item/reagent_containers/glass/afterattack(obj/target, mob/user, proximity)

code/modules/reagents/reagent_containers/hypospray.dm

@@ -101,13 +101,14 @@
 		reagents.maximum_volume = 0 //Makes them useless afterwards
 		container_type = NONE
 	update_icon()
-	spawn(80)
-		if(iscyborg(user) && !reagents.total_volume)
-			var/mob/living/silicon/robot/R = user
-			if(R.cell.use(100))
-				reagents.add_reagent_list(list_reagents)
-				update_icon()
-	return
+	addtimer(CALLBACK(src, .proc/cyborg_recharge, user), 80)
+
+/obj/item/reagent_containers/hypospray/medipen/proc/cyborg_recharge(mob/living/silicon/robot/user)
+	if(!reagents.total_volume && iscyborg(user))
+		var/mob/living/silicon/robot/R = user
+		if(R.cell.use(100))
+			reagents.add_reagent_list(list_reagents)
+			update_icon()
 
 /obj/item/reagent_containers/hypospray/medipen/update_icon()
 	if(reagents.total_volume > 0)