Questions for people who already own it. - Has anyone checked whether the water in the self-cleaning system is actually hot? According to some reports, it is at most lukewarm, around 36°C, which would tend to counteract the disinfectant effect and accelerate the build-up of germs. - According to some reports, the extendable side brush should stop turning completely, especially in corners. The contact angle is also said to be less than ideal, so that the wiping result is sometimes poor as the bristles only rest on the floor at the front. Is this really the case? - What is the approximate dosage of cleaning agent and can this be adjusted if necessary? I'm actually about to buy it. I currently have the S7 MaxV Ultra and apart from problems with the battery and mapping, I am very satisfied. However, the points in question above are decisive for me, as it is anything but cheap. If the retractable brush and hot water cleaning don't work perfectly, there is no added value compared to the s7 MaxV Ultra. However, I don't entirely trust the early reviewers either, as some of them have pre-series appliances. Many thanks in advance.