If you are experiencing your airlock bubbling or foaming a lot, even until the point it is coming out of the airlock and dripping on to your keg; do not worry! You can see the picture below as an example.
Your beer and airlock are absolutely fine. When heavy beers are fermenting the airlock might be very active and can possibly overflow in certain cases for a short while. When this happens you can take the following actions:
- Remove the airlock
- Remove any liquid that has pooled on top of the keg lid or around the keg
- Sanitize keg lid and airlock well
- Place back the airlock as you initially did with some fresh water