Before I keep explaining the problem I would like to apologize if I called this issue wrong name. I am new to this and I hope you can correct me.
Maybe this is why I can't find it in forums or other places.

After every 90 degree corner my printer makes these tiny consistent and unnoticeable waves along walls. Its extra visible with the transparent blue PLA filament. You can barely see it but its there.
Is there anything I can do to solve this?