With us, the milk foam works with milk drink and also with lactose-free milk.
We had the same problem once. The transparent, flexible hose section was not pressed completely flush against the "block" (tight).
This may help

Hello

It doesn't work for us either :-/

Sorry, I have the same problem. Regardless of whether I use full-fat, skimmed or oat milk, the milk froth is maybe 2-3 mm high and it also makes a lot of noise when frothing.

Ours works perfectly!
- Descaling the machine
- Thoroughly clean the Rappid Cappuccino system and make sure the air inlet is unobstructed
- Use cold milk
Return the machine to the after-sales service if it is still under guarantee

I had the same problem and because of that i return it