Your Spawn Is Contaminating Because of This Pressure Cooker Mistake

If your mushroom grows keep contaminating, the problem may be happening before you ever inoculate — during sterilization. In this video, I break down the most important pressure cooking steps that beginners misunderstand, including steam purging, time at pressure, and proper cooling to prevent contamination and suck-back. This step-by-step guide shows how to pressure cook grain spawn jars, spawn bags, liquid culture, and other mushroom growing supplies safely and effectively. These same sterilization principles apply whether you’re preparing oats, rye, millet, or other grains, as well as liquid culture jars and substrate bags. Following these techniques will dramatically improve your success rate and help you avoid hidden contamination that shows up weeks later. *Get your mushroom liquid cultures here* ➡️ https://www.happymycelium.com *Beginner Gear List* ➡️ https://happymycelium.com/pages/gear-list 22 Quart Pressure Cooker https://geni.us/LcLEl These are amazon affiliate links and I will receive a small commission for any purchases made through these links.