From experience, when it’s a bit humid here the pucks out of my espresso machine start growing visible mould in my knock box extremely quickly. Sure, refrigera

From experience, when it’s a bit humid here the pucks out of my espresso machine start growing visible mould in my knock box extremely quickly. Sure, refrigerating them and keeping them in an airtight container would slow that but why risk it when all the good flavours of the coffee are already extracted?