Purchased 2nd hand about 6 months ago
Have removed shower plate and holder. Wasn't much behind, but gave it a good clean. Have also descaled.
Haven't tried backflushing and not sure how to. Presume you need to have a block or similar in the filter basket ?
Without the portafilter in place the water passes through in a steady shower like manner.
After cleaning I tried again and first cup was ok, but only one side of the portafilter was passing coffee the other side was a slow drip). Tried a second cup and virtually nothing at all. Tried pre-ground coffee and seems to work ok(reasonable crema) - flow rate 20 sec for one espresso.