Questions about Kärcher RCV 3

Streaks on the floor tiles, do you have any tips? After he cleans with water and the cleaning cloth, there are streaks on the floor. We have tried warm water in the container, or even a drop of washing-up liquid (yes, we know you shouldn't do that): Doesn't help. If we clean it by hand, it's much better. At first it seemed a little better when we selected "maximum water supply", but the result is not great.

Can I also operate this dust robot without an app? sorry about that, I'm a bit "old-fashioned".

Is the vacuum cleaner capable of raising/lowering mini bearings?

Does anyone know if it works on carpets?

Robot received today. Checked everything and of course tried it out straight away. No problems connecting and creating the user account. When creating the card, it drove under the bed and just spun round in circles. I have now tried this step 3 times. Is there a trick?

When I repeatedly tried to set up the Kärcher Home-Robots app for my newly purchased Kärcher RCV 3, I always failed at the last step of the network configuration: the robot was supposedly successfully connected to the network (I tried it with 2 different WLANs), but then I was asked to reconfigure it. The two suggested possible reasons for the failure could not solve the problem. Has anyone had similar experiences or knows where the problem might lie?

Can some please provide a list of the best robot vacuum cleaners with mopping function purchasable on Galaxus that i) don't have a camera (and ideally no microphones) and ii) have privacy/security certifications (e.g. TÜV or AV-Test). Thanks!

Ramp: We need ramps in 3 places to climb the threshold. I couldn't find anything on sale at Galaxus, how can that be?

On the right-hand side it has the rotary brush... in the middle is the suction slot (slightly shorter than the hoover on the right and left), isn't it? Does it then have 2 cm on the left where it simply drags the cleaning pad over the floor that has not yet been vacuumed (where neither the suction slot nor the rotary brush can reach)? If there is dust and stones there, for example, won't that scratch the floor? And: Can you also let it run without the pad?

Are the devices also suitable for pet hair?