diff --git a/README.mdown b/README.mdown
index 7ae8574..90f7c2a 100644
--- a/README.mdown
+++ b/README.mdown
@@ -427,7 +427,7 @@ imperial | metric
 
 1. With a sanitary syringe extract 1 ml of [liquid culture](#liquid-cultures) and replace the screw top.
 
-2. Inject syringe into the jar of [grain spawn](#grain-spawn) by piercing the aluminum foil straight down along the side of the jar.
+2. Inject syringe into the jar of [grain spawn](#grain-spawn) by carefully piercing the aluminum foil straight down along the inside of the jar.
 
 3. Replace the mason jar lid by flipping it so the seal is facing up and lightly screwing on the rim.