For the past few months I’ve been using a mesh shower screen. I rinse the basket a the puck screen under a running tap after each shot. It looks clean.
After a week, I have been soaking it in PulyCaf, and agitating the solution with the screen inside a plastic container so it’s thoroughly clean.
This is the aftermath after an average of 2 coffees a day, after 1 week of usage.
I did the same thing with the filter basket, the shower screen and dispersion block, and those are nothing like it. They are clean as a whistle.
Shows how effective the puck screen is in terms of keeping the group clean.
Just remember to clean it periodically.