diff --git a/experiments/slimemold/main.go b/experiments/slimemold/main.go
index 319b382..a21273a 100644
--- a/experiments/slimemold/main.go
+++ b/experiments/slimemold/main.go
@@ -34,7 +34,7 @@ func main() {
 	})
 	experiment.InitPheromone("trail", color.RGBA{0x80, 0xFF, 0x00, 0x00})
 	experiment.OnStep = func(environment *core.Environment, turtles []*core.Turtle, i int) {
-		environment.EvaporateAndDiffuse(0.99, "trail")
+		environment.EvaporateAndDiffuse(0.95, "trail")
 	}
 	experiment.Run()
 }