Everything was fine. This was my first kit. It was pilsner. I put the yeast then closed the lid. After 20 minutes I realized there is a little leaking from faucet. I sanitized my arm and open lid, reach the gasket, tighten it, then closed the lid. I was fast. Today is the third day. Airlock bubbles steadily. I'm seeing krausen. Smells good. I don't have any measures unfortunately. But did my beer get infected. How can I understand without measuring? What are the chances?