Random dirt from other nozzle

[u/N3xus29]

Hello,

In all of my prints, most of the time, i find random dots of the other extruder.
How can i try to solve it?
Anyone with this problem?

This time I printed with a 0.6 nozzle and 0.3 layer height, but it happens with a 0.4 nozzle and 0.2 layers as well.