Used/2nd hand Black & Decker ''Mr. Cappucino'' milk frother -manu

Try filling both water and the milk container with the correct decalcifying solution - just slit the 500 ml that results from the 1:1 mixture and - without the coffee capsule - press the cappucino button. Instead of cappucino you will get the decalcifying solution running through the entire system including the connector for the milk container (unlike the recommended decalcification method where you use the extra nozzle). Good luck - worked for my machine which only produced steam but no milkfoam...

There may be an issue with the milk you are using if your Keurig K cafe frother is only heating milk and not frothing it. There is nothing wrong with your frother.
You must consider changing the milk you are using and hopefully, your problem will be solved. Read this article for complete details on fixing the frother.
Keurig frother not working

Plugged ports or bad milk.

Had this exact problem a few times on a cleaned well maintained milk jug top with an ESAM5500M. Delonghi 'repaired' it by sending a new milk jug frothing top.

It's caused by milk fat deposits, the frother part on the milk jug may look clean but deep inside it's not. I clean mine with pipe cleaners, detergent and hot water and still it wouldn't froth.

The problem re-occurs for me every 6 months or so. You could buy the milk fat remover solution to clean it. Personally I just boil the whole milk jug frother in detergent and the again in descaling solution, that's fixed this problem twice now, although I think it will eventually corrode the 'o' rings on the frother, still cheaper than buying a new frother part each time though.

If it still doesn't work after that, the only other reason for this problem I found mention of was caused by a broken rubber seal where the milk jug fits to the machine. It's most likely to be milk fat deposits inside the frother though.

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Try a differnt milk. Make sure you are using the spring attachment. My best froth comes from skim milk and a teaspoon of fat free liquid vanilla creamer.

guess the problem is fixed long time ago? anyway i am happy to let you know if this appliance still annoying you.
i ve one which bought at laverton market some months ago, same problem as yours: no manual and even black and decker ignore my request to send me one. therefore i studied the construction and found out how it use:
1. fill up water to the level which engrave at the cylinder. (can fill hot or boiled water to save electricity and speed up the heating process)
2. when it boil power will off automatically, remember do not overfill to leave room for the generated steam;
3. plug off the power; pull up the looped pin of the bend tube;
4. place your milk jug (of course with milk or soy filled inside may be half full only);
5. press the grey button on the cylinder top (use some more energy; i know it is hard!) steam will come out to frothy your milk. 70c for latte, or 85-90c for cuppancino something like that.

hope this can help!

It doesn't froth because the air hole in the frother has become plugged with dried milk (cream). There are two types of frother - old one was a black rubber nipple with a stainless 2-3inch air tube rising above the milk. The plastic insert has a pin hole (really about the size of a straight pin!) that clogs. Use a sewing needle or straight pin to clear it.

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