diff --git a/inventoryManager.lua b/inventoryManager.lua
index ad0db89..58c25f8 100644
--- a/inventoryManager.lua
+++ b/inventoryManager.lua
@@ -7,7 +7,7 @@ local POLL_INTERVAL = 2    -- seconds between barrel checks
 local MONITOR_SIDE  = "left"
 local SCAN_INTERVAL = 120  -- seconds between full background scans
 local SMELT_INTERVAL = 3   -- seconds between furnace checks
-local SMELT_RESERVE  = 64  -- keep at least 1 stack of each raw material
+local SMELT_RESERVE  = 128 -- keep at least 2 stacks of each raw material
 local DEFRAG_INTERVAL = 600 -- seconds between defrag passes (10 min)
 local COMPOST_INTERVAL = 3  -- seconds between composter checks
 local ALERT_INTERVAL  = 15 -- seconds between alert re-checks
@@ -367,10 +367,18 @@ local COMPOSTABLE_SET = {}
 for _, name in ipairs(COMPOSTABLE) do COMPOSTABLE_SET[name] = true end
 
 -- Reserve: keep at least this many of each compostable before composting the rest
-local COMPOST_RESERVE = 16
+local COMPOST_RESERVE = 128 -- 2 stacks
 local COMPOST_DROPPER = "minecraft:dropper_10"
 local COMPOST_HOPPER  = "minecraft:hopper_0"
 
+-- Trash items: compostables with zero reserve (always fully composted)
+local COMPOST_TRASH = {
+    ["minecraft:rotten_flesh"]         = true,
+    ["minecraft:spider_eye"]           = true,
+    ["minecraft:poisonous_potato"]     = true,
+    ["minecraft:fermented_spider_eye"] = true,
+}
+
 -------------------------------------------------
 -- Crafting recipes (for networked crafting turtle)
 -- grid: 9 entries mapping to turtle slots 1-3, 5-7, 9-11
@@ -2609,7 +2617,8 @@ local function autoCompost()
                 totalInStorage = totalInStorage + src.total
             end
 
-            local available = totalInStorage - COMPOST_RESERVE
+            local reserve = COMPOST_TRASH[itemName] and 0 or COMPOST_RESERVE
+            local available = totalInStorage - reserve
             if available > 0 then
                 local toFeed = math.min(available, dropperFreeItems)
                 local fed = 0