S6 Max V leaving streaks from mopping

When the mopping job from my S6 MaxV dries, there are streaks on my tiles. During the mopping phase, I can see that the mop is wet in 3 places, so it seems like water is not being released onto the mop uniformly, but in 3 places. I tried wetting the mopping cloth before starting, but this only works in the beginning, i.e. the mop is uniformly wet the first 5 minutes, but the streaking begins after that. The water level is already set to high so I can't release more water onto the mop cloth. Any ideas how to solve this problem?

My device is brand new (it's only been a couple weeks) and it's been doing this from the beginning. Thanks!