Espresso filters and filter holders should be as hot as possible when you prepare coffee. They should always be inserted into the group for this reason. This way you can reach a stable temperature for preparing your espresso. When the barista loads the next portion of coffee, the filter should be pure and dry.

Some other things to keep in mind:

-Before inserting the holder into the group, you have to carefully remove the ground coffee from the filter’s edges.

-After the holder is inserted into the group, it needs to be turned with the appropriate amount of force (you have to do this to get the ideal tightness in the group).

-You should begin preparing the espresso immediately after inserting the holder. In filters and holders coffee oils can accumulate, so they require regular cleaning.