StepDoWhy
CleanStart with a grease-free, cold-rinsed glassA clean glass holds a better head
WetRinse and don't dry itSurface water is what freezes to frost
FreezeUpright in the freezer 30+ minEven frost; an hour for a heavy mug
When not toSkip frost for craft/aromatic beerExtreme cold mutes flavour and aroma