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I'm guessing this is a table top machine. If so then I take your meaning of "Blowing Off" as in turning off or running out of steam. The table top steamers usually found on home units do not have the capacity to froth large mugs like a "Venti" 20 oz cups. You will have to wait for the boiler to re-heat. It's best to heat a smaller cup of cold milk, pour the milk into the venti and make a 2nd batch again with cold milk. (It's hard to re-froth hot milk).
* check your steam wand tip if it's plugged with old milk. Soaking the wand in warm water overnite will help soften the milk which can be blow out when you make steam again. If you make a lot of milk drinks, it's a good idea to give the wand a blast of steam, then a good wipe with a damp cloth to keep milk residue off the wand.
* It's also possible your steam heater is starting to clog up. If you find that it gets slower and less steam with time then the steamer will need to be replaced. Check your warranty and call for service.
* Please update question with brand and model if you want more help.
90% of all my service calls were due to machines that were not cleaned DAILY. About a third of those were for espresso machines with a steamer and the rest for auto frothers. Most Barista's don't use auto frothers as they have very little control over the frothed milk. (Heat, froth density, firmness, holding, etc.) Milk(any type) will clog a machine in minutes if not cleaned up after use. Spoiled milk will contaminate any product with curds and have a bad smell to coffee.
* Clean up after any milk usage. Seconds count after frothing milk with a steam wand. Get workers in the habit of removing milk pitcher from wand and give the wand a short blast to flush the wand and wipe with a damp towel (tower wash and sanitized often) Leave the folded (quartered fold) next to wand on drain tray where it's always handy.) It only takes seconds to perform and customers appreciate the cleanliness and professional look.
* take a tip from Bartender's; you HAVE TO WASH WITH DETERGENT! when washing glasses that had milk drinks in them. Nobody want's a sour milk smell in any drink. Milk film can only be removed with soap and water and a brush. That's why you see automatic cup washers on every bar set up. It does take elbow grease to get these cups clean.
* Harden, cooked milk (coffee to) is best soaked in clean water (detergent optional) and let it sit over nite. This is a good practice to keep everything coffee/milk stain free as everything is washed/rinsed prior to use in the morning.
* Really, really baked on coffee (left burning on warmer for several days, weeks. Will need an urn cleaner to soak and wash out several times. Check with your coffee vendor as most will just swap them out with clean ones. Otherwise ask for urn cleaner from them and follow instructions. Hot water with a tablespoon of urn cleaner for each pot and let soak over nite. wash and rinse thoroughly prior to use.
"Washa-washa!" Aloha! ukeboy57
The tube on the "ball assembly" which connects to the "milk" tank may be missing an O-ring. If this O-ring is missing, the steam will only siphon a little bit of milk because there is no seal. If it is working properly, the siphon can fill be expected to fill a cup in about 30 -60 seconds.
You did not state anything about descaling, but every now and then, I also add water and descaler to the milk container and use the "Frothing" program to run through the water and descaling-solution (double-click the Cappuchino button).
I have also noticed that the first cup (and sometimes even the second) will produce less milk, and not as well frothed milk as later cups. My theory is that the machine is warmer when producing later cups.
If possible, you could try to run two-three frothings of plain water through before switching to milk. I realize this is inconvenient, but it could be worth testing this to see if it helps. We luckily have two milk containers and keep one filled with water just for the purpose of heating up (or whatever we do :) the frothing system before serving the first cappuchino.
Steamer tubes can get plugged up with dried milk and/or calified water deposits in the tube. With the machine unplugged, turn the tube up to check it, Clean it with a small guage wire. Soak it in a small cup of vinegar, if needed. Further cleaning, you can add a bit of vinegar to the water and steam it thru... Let me know how it goes. K
please relay on your experience realizing that you now have new steam pipe(with different holes in the end of it and different pressure) you will need to get use to them and get maximum quality of that steam pipe. my advice:
every time hold your hand in the bottom of milk container, so that you will prevent overheating which often gives the result you mentioned.
he trick to this is making sure you have steam comming out of the wand and not water. To do this, make sure you get the steam started before you begin. To get a light foam that will not deflate, hold the wand just under the surface of the milk. You should hear a steady, high pitched noise and you should not hear the splatter of bubbles popping on the surface. Popping noises mean that the wand is too high in the milk and your froth will not hold up. A low pitched noise from the cup means that the wand is too far down in the milk. This will heat your milk (for hot chocolate), but will not give you a good foam. Good luck!