My experience with these nozzles: Unfortunately, these things are not fit much. After max. 3-4 months they give up their minds, that is they are clogged, or calcified. A rinsing with eg warm and slightly diluted vinegar can indeed provide a remedy here, but only for a short time, then goes nothing ... a new 'descaling' brings no success. The rotating wheel inside the nozzles fail their service and even the 'switchover' to individual beam no longer produce the desired result, or cleaning action. Conclusion: the much acclaimed 'Brown-quality' unfortunately is also no longer the ones they used to be.
PS Unlike the nozzles I want to say that I feel at the brush that they keep a lot longer than they used to, though.
