diff --git a/rust/src/milla/constants.rs b/rust/src/milla/constants.rs
index b75aa905166..550ec73fcc1 100644
--- a/rust/src/milla/constants.rs
+++ b/rust/src/milla/constants.rs
@@ -120,7 +120,7 @@ pub(crate) const PLASMA_BURN_MIN_TEMP: f32 = 100.0 + T0C;
 pub(crate) const PLASMA_BURN_OPTIMAL_TEMP: f32 = 1370.0 + T0C;
 
 /// How much of the plasma are we willing to burn each tick?
-pub(crate) const PLASMA_BURN_MAX_RATIO: f32 = 0.05;
+pub(crate) const PLASMA_BURN_MAX_RATIO: f32 = 0.01;
 
 /// How much of the plasma do we burn anyway if the ratio would make it really small?
 pub(crate) const PLASMA_BURN_MIN_MOLES: f32 = 0.001;
@@ -148,10 +148,10 @@ pub(crate) const TEST_TOLERANCE: f32 = 0.1;
 pub(crate) const SPACE_COOLING_THRESHOLD: f32 = T20C;
 
 /// Lose this amount of heat energy per tick if above SPACE_COOLING_THRESHOLD.
-pub(crate) const SPACE_COOLING_FLAT: f32 = 2000.0;
+pub(crate) const SPACE_COOLING_FLAT: f32 = 200.0;
 
-/// Lose this ratio of heat energy per tick if above SPACE_COOLING_THRESHOLD.
-pub(crate) const SPACE_COOLING_RATIO: f32 = 0.002;
+/// Lose this ratio of heat energy per Kelvin per tick if above SPACE_COOLING_THRESHOLD.
+pub(crate) const SPACE_COOLING_TEMPERATURE_RATIO: f32 = 0.4;
 
 /// Tiles with less than this much gas will become empty.
 pub(crate) const MINIMUM_NONZERO_MOLES: f32 = 0.1;
diff --git a/rust/src/milla/simulate.rs b/rust/src/milla/simulate.rs
index befff52558e..2cdc5ab964d 100644
--- a/rust/src/milla/simulate.rs
+++ b/rust/src/milla/simulate.rs
@@ -681,7 +681,7 @@ pub(crate) fn apply_tile_mode(
             if my_next_tile.temperature() > SPACE_COOLING_THRESHOLD {
                 let excess_thermal_energy = my_next_tile.thermal_energy
                     - SPACE_COOLING_THRESHOLD * my_next_tile.heat_capacity();
-                let cooling = (SPACE_COOLING_FLAT + SPACE_COOLING_RATIO * excess_thermal_energy)
+                let cooling = (SPACE_COOLING_FLAT + SPACE_COOLING_TEMPERATURE_RATIO * my_next_tile.temperature())
                     .min(excess_thermal_energy);
                 my_next_tile.thermal_energy -= cooling;
             }
diff --git a/rustlibs.dll b/rustlibs.dll
index a4b6dd3858c..9ff2cf0ca90 100644
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diff --git a/rustlibs_prod.dll b/rustlibs_prod.dll
index 67b578febb5..fde6bd0f899 100644
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diff --git a/tools/ci/librustlibs_ci.so b/tools/ci/librustlibs_ci.so
index b18b7e696cb..96e744b5efb 100644
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