Grain Rot How to Burn the Rot — Fire, Lanterns, and the Blocked Second Floor

Rot is the one status in GRAIN ROT that has a mechanical answer rather than a consumable one: you burn it off. The credited survival guide is blunt about the reason, because your vessel is wood and the world is a scorched wasteland, fire is both the disease and the cure, and the skill is in keeping the exposure short. This page covers grain rot how to burn the rot across the two places it matters most: curing your own vessel during a run, and clearing the contamination that blocks progression after the second floor reopens. Everything here comes from credited community guides and the official Steam description; the numeric details from single sources are marked as unconfirmed.

This page is compiled from the credited community documentation and the official Steam listing; details that rest on a single source are marked to confirm.

How Fire Clears Grain Rot

Rot builds when you stand in contaminated liquid or spend time near certain Corrupted, and the community-documented thresholds are worth knowing: above 50 your character sounds sick and shakes, and at 100 you vomit, lose health, and begin radiating Rot onto nearby players and NPCs. Standing out in the sun is the surface cure, and it costs health while stripping every stack. Deeper down, the practical tool is a lit lantern you break to leave an area of flame, which burns Rot off a vessel gradually rather than instantly. The credited guides describe the clean version of the trick as a four-step loop: create the fire, step in long enough to clear what needs clearing, step back out, then recover the health you just traded.

Rot source	Where it comes from	First response
Contaminated liquid	Coated sections of the Deep Layers	Do not linger; route around it
Close Corrupted	Rot-ooze appliers and followers	Increase distance and check the meter
Rot Bloom modifier	The air itself on that layer	Set a strict extraction timer
Carrying it home	Boarding the elevator while symptomatic	Cure before you board

The Rot rules worth remembering at a glance:

• Fire is the cure, whether from the sun or a broken lit lantern.
• Above 50 the character visibly suffers; at 100 the symptoms spread to allies.
• Never board the elevator with Rot, because it damages the Outpost at home.
• Cure in short bursts and heal immediately afterwards.

Where Rot Blocks Progress

Rot is not only a personal status. The community second floor guide treats contamination as a progression wall: once the key is returned and the upstairs floor reopens, the area has Grain Rot that has to be dealt with before the floor becomes useful again. The rule the guide uses is short, that if the Rot is blocking progression, burn it, because fire removes the contamination. The warning that comes with it is equally short: fire can also hurt your vessel, so do not turn clearing Rot into a prolonged burn. Create the fire where it is needed, let it do the job, and move back out, recovering before forcing the next step. The same guide cautions against pre-buying lanterns, since spending only makes sense when fire is the thing standing between you and the objective in front of you.

The progression sequence the guide lays out is deliberately small:

• Reopen the second floor with the key and stop thinking about the key itself.
• Identify the Rot that blocks the next objective rather than clearing every patch.
• Create fire at the blocker, clear it, and leave the flame behind.
• Recover health before committing to the next exposed route.
• Follow the upstairs objectives, which lead to Tink and the equipment Upgrader.

Curing Without Burning Your Vessel

The mistake that turns a cure into a second emergency is standing in flames. Every credited source frames fire as a trade rather than a free heal, because the damage lands on the same wooden body you are trying to save. The safe pattern is to treat Rot removal as one step in a recovery loop rather than a standalone action: clear the Rot, get out of the fire, then heal the health you spent before doing anything else. Pair the cure with a plan, whether that is a nearby bed, a repair item, or a retreat path you already understand, because removing Rot and then pushing on at low health simply swaps one problem for another.

Situation	Cure choice	Recovery plan
Rot before a descent	Surface sun, then heal	Rest at the Outpost before riding down
Rot mid-run without a lantern	Avoid the source and extract	Bank the run rather than curing in the dark
Rot blocking the second floor	Lantern fire at the blocker	Heal before the next exposed route
Rot on the whole crew	Cure everyone before boarding	Keep symptomatic players outside the Outpost

Two habits keep Rot from compounding. First, run a rot check before every extraction, which the community tip lists treat as a standard callout alongside ammo checks, and never board the elevator while symptomatic, because carrying Rot home is described as damaging a random Outpost room. Second, set your depth limit by your cure capacity rather than your courage: if you cannot reliably clear Rot and heal afterward, the next layer down is not worth the loot. When Rot is not the blocker, the symbols page explains which elevator modifiers worsen it, and the revive page covers the recovery tools that pair with every cure.