For me, the top does not work, the light stays on permanently. A very obliging subsequent delivery of a new tower was not successful, despite considerable pressure. The light was on again. Since it works with some and not some, it is probably on tap, strainer, pressure or product (perhaps not quite ready for the nice gimmick)? I do not know ... but shame.
The dealer is thoroughly recommended, in my view. responded immediately, very accommodating and friendly. I would again at any time in this order. So it's all about this specific product.