Approximately every six months you need to do a deep clean of the brew unit of your superautomatic espresso machine. Once the brew group has been thoroughly cleaned and dried, you need to relube the pivot points and piston. A curved utility syringe makes simplifies this task.
Check out this video to see how.
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Great for getting lubricant into hard places like inside the brew group. Pull the plunger out, put some lub in, replace plunger and your good to go.