How do I use? NOTE** Some of the following steps require a commercial or semi-commercial backflushable espresso machine. If you are unsure if your espresso machine fits this profile, check with your espresso machine manufacturer before proceeding. If your machine is NOT a backflushable commercial or semi-commercial espresso machine, use step 3 ONLY. 1. On-board detergent spoon, place a spoonful or less of Espresso Parts Espresso Machine Cleaner by backflush detergent into a blind insert" (without holes) in your portafilter handle. 2. Attach the portafilter to the group and start backflushing your machine following the instructions on your detergent package. 3. When its time to flush out the system