Why milk systems block

Clean the Milk System After Every Use
Milk residue begins drying within minutes of making a drink.
Engineer's Tip: Running the automatic milk rinse programme immediately after use is one of the best ways to prevent blockages.
Don't Leave Milk in the System
Milk left inside the machine for several hours allows proteins and fats to harden inside narrow passages.
Engineer's Tip: Empty the milk container and rinse the system as soon as you've finished making milk drinks.
Use a Milk System Cleaner Regularly
Water removes fresh milk, but it doesn't always dissolve dried milk proteins and fats.
Engineer's Tip: Regular deep cleaning with a suitable milk system cleaner helps remove deposits that rinsing alone cannot.
Clean Every Removable Part
Milk carafes, frothing nozzles and milk tubes often contain small air passages where residue builds up.
Engineer's Tip: Take removable milk components apart regularly and clean every opening thoroughly.
Replace Worn Milk Tubes
Over time, milk tubes can become stained, stiff or difficult to clean properly.
Engineer's Tip: Replacing inexpensive milk tubes periodically helps maintain reliable milk flow and good hygiene.
Act on Early Warning Signs
Poor foam, spluttering milk or reduced milk flow are usually early signs of milk residue building up inside the system.
Engineer's Tip: Cleaning the milk system at the first signs of reduced performance is often much easier than clearing a complete blockage.

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Why do coffee machine milk systems become blocked?
Milk contains natural proteins and fats that dry quickly inside milk tubes, frothing nozzles and air passages. Without regular cleaning, these deposits gradually restrict milk flow and reduce frothing performance.
Is rinsing the milk system enough?
Automatic rinsing removes fresh milk, but it doesn't always remove dried milk residue. Regular deep cleaning with a milk system cleaner helps keep the milk circuit clean and performing properly.
How can I stop my milk system becoming blocked?
Clean the milk system after every use, carry out regular deep cleaning, dismantle removable milk components where possible and replace worn milk tubes when necessary. Regular maintenance is the best way to prevent blockages and maintain consistent milk frothing.