DON'T TRY THIS AT HOME without proper training.
Here is what you need to know, explained by our very own Beer expert Martin Schweiger at the Deutscher Abend Singapore held at Blk 28 Dover Crescent - WUERSTELSTAND within 7Stars Coffee Shop
Danke Martin Schweiger.
und hier auf meinem Youtube-Kanal
https://youtu.be/hS1StVGpvAg