Cleaning and maintenance of Italian coffee machine correct maintenance of semi-automatic coffee machine

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As long as the coffee liquid touches the surface, the coffee oil will continue to stick to it. Because of its unstable chemical properties, the accumulated grease will soon become bitter. When freshly brewed coffee comes into contact with these old oils, it will smell rotten.

The bad news is that there is a common problem of dirty machines in most cafes.

The good news is that this problem is easy to solve, as long as you wash it diligently and "cook" it again.

The chef of the restaurant will check the plate when he has nothing to do, and is always required to be clean. The same espresso bar should look at the filter handle and outlet head with the same mentality. But it can't be completely free of coffee grease, lest espresso come into direct contact with the exposed metal surface. Therefore, every time you clean the filter handle and use espresso special detergent to backwash, make a cup of coffee and then pour it out.

Key cleaning points of coffee machine

a. Filter handle

When you usually make coffee, you have to wash it every hour. After closing every day, dissolve it in hot water with a spoonful of detergent. Separate the coffee filter from the handle and soak in it overnight. When soaking, do not dip into the plastic part of the hand, so as not to be eroded by the detergent. The next morning, scrub hard with a sponge brush (for washing glass). Use a small bottle brush to reach into the small passage of the handle outlet and brush off the small pieces of debris that stick to it.

Form a good habit of cleaning every night so that coffee oil will not accumulate. Otherwise, if the grease slowly accumulates and forms a hard lump and sticks to the outlet, it will be very difficult to clean up.

If the filter handle is dirty, the appearance and taste of the espresso will change, the crema is less, and there will be white lines.

b. Backwash with espresso special detergent

There is a gadget called "non-porous filter" (it looks like an ordinary filter, but there are no holes in it. Remove the general filter from the handle and put it into the porous filter, which is used to block the water pressure of the pump and let the water flow backwards.

Modern boiler-type espresso machines have valves and drainage lines for releasing remaining high-pressure hot water. Otherwise, after you finish this cup, when you plan to cook the next cup and remove the handle of the filter, high-pressure hot water will flush out and spray the brewed coffee powder all over the place. So after cooking a cup, there must be a pressure relief valve to release the pressure. This valve and related piping, located at the back of the hot water dispersion screen of the outlet head, are generally referred to as the "countercurrent system". When brewing water flows out, the effluent system, coffee and countercurrent system share a set of piping. This common pipeline will deposit coffee grease and give off a rancid smell after oxidation.

There is already a special detergent for espresso to dissolve and wash away the grease that has accumulated in the pipeline valves. The main ingredients of the detergent are: sodium phosphate foaming agent (buffer)

How often do you wash it backwards?

Do it at least once every night at closing time. Use according to the instructions of the cleaner. (there will be different cleaning methods for different machines, depending on which machine you are, use the method specified by it)

We put a tablespoon of detergent in the porous filter, put it in the filter handle, lock the handle, start the pump for 30 seconds, and turn off the pump. Wait for the pressure to release, then start the pump. Repeat this twice at intervals of 3 to 4 seconds.

After cleaning, don't forget to rinse the water before making coffee. Remove the porous filter and rinse with hot water. Then briefly turn on / off the pump several times until the outlet head has been washed clean. Then put the clean perforated filter back on the handle and lock it. Start the pump for 5 seconds and turn off the pump. Repeat this five times. (to be clean, the countercurrent system should be flushed with clean water at least 5 times.)

Maybe you need to wash it with detergent a few more times during business hours. Drink your own coffee often in order to determine the appropriate cleaning interval.

c. Water diversion network

Remove the water distribution network and clean it every night, then clean the fixing screws and outlet head.

d. Washer

After removing the water diversion net, you can see that there is a gasket. It is used to seal the gap between the outlet head and the handle of the filter basket to prevent high-pressure water from seeping out. Clean the gasket with a small stiff brush. (many manufacturers and agents sell special brushes)

e. Outlet head

After removing the water diversion net, you can see a large brass structure (which may also be made of other metals), that is, the outlet head. Clean it with Scotch Brite every night.

f. Steam sprinkler

After closing every night, remove the steam sprinkler and use a pin or brush to clean the steam out of the hole. Then use a small brush to pass through the steam pipe, and many technicians will advise you to soak the whole steam stick in water overnight to soften and peel off the hard lumps that stick to it. This is not good because there will be problems: if the electricity in the house is also turned off, the boiler will cool and dirty water will be sucked back into the boiler from the water container through the steam tube.

In a word, develop good cleaning habits. Do this cleaning work with your bar buddies every night, and the coffee can be made to maintain its consistent high quality. It can prolong the life of the machine and increase the reliability of the machine. Pay attention to the filtration of water quality and be regularly overhauled by technicians trained by the original factory.