Put the coffee filter in the oven (yes the OVEN) and run a auto-clean cycle, it will turn all to hashes. Run a clean water cycle after to clean it. It may discolor the filter a bit, but this is only cosmetic.
It happened to me because the grinder at the grocery store had trouble without anybody noticing it. It's then I decided to buy my own grinder.
The same thing happens to mine when I grind the coffee too fine. Try grinding a bit coarser, and pack extra grounds in. Amazing coffee when you get it right, and the grounds aren't runny with the coarser grind.
Hope this helps.
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Perform a full descale. Take out the water reservoir and remove the Anti-calc filter. Put in 500ml (1 pint) water with 3-4 tablespoons of white vinegar (or apple cider vinegar). Put the water canister back in, the turn on the machine and press the manual button. Allow half of the liquid to go through, then stop. Leave the machine for about ten minutes, and then run the rest through. Empty the water reservoir and rinse, put back the Anti-Calc filter, put in another 500ml and press the manual button to flush it all through.
Pleas do not soak this in vinager, try this process with vinager
and most cost efficient way to fix this issue with HEAD SPRAYER HOLE clogging is to run vinager through the system several times. The compounds in the vinager serve as a cleaning agent to clean the heads naturally and allow the coffee to travel once again in the same holes it did when you first purchased the unit!!! Just fill up the pop with straight vinager and allow it to run through the system just as if it was coffee! This WILL NOT have any harmful affects to you or the coffee system unless you are allergic to vinager.
For every cup of espresso we mean about 25cc to 30 cc and you have to use from 7 to 8 gr of groud coffee per cup according to the coffee blend and how strong you wand the aroma of your coffee. The running time for making either one cup or two cup with apropriate filter is about 24 to 30 sec maximum.
Hi All. I too was having this so called exploding issue with my machine & couldn't get any coffee!! The culprit is a clogged filter!! As you might know, Breville uses a double wall construction for the filter which incorporates an inner cup with many fine holes and there is only ONE small hole on the bottom of the outer wall(bottom). I guess over time some fine fine grounds get thru the inner layer and accumulate between the two layers and eventually get compacted enough to completely clog the filter to a point that the pump cannot push the water through it!! Thus the pressure from the pump can't escape & is releasd when you try to remove the coffee basket!! You can try to use a small pin inserted in the bottom hole to see if it clears the obstruction. It didn't work for me! I even tried using high pressure air to clear it, again unsuccessful! THE FIX: Buy a new filter!
P.S. I found my machine to have some build up behind the strainer where the water enters the coffee chamber. To clean and clear, follow these steps: Unplugg the power cord!! Remove the watertank. Remove the filter holder. Turn the machine upside-down, Remove ONE screw in the center of the coffee chamber(It looks like a strainer with several holes). Remove the strainer and wash & clean any build up behind it. Reinstall in reverse order.