Good morning, world. As my title says. When I fly and hover, the drone slowly rotates without any input from me. Meaning that I have to continue to correct it, to keep it staying on station. The rotation is always anti-clockwise. I have recalibrated the compass and fitted new props. I never fly in high winds either. And I never exceed the legal altitude. What can be causing this issue? Your advice would be really appreciated. Thanks, Guys. Dave in Suffolk, UK