Hi
Why would it be a scratch? You use a cleaning movement along the landscape orientation but you marks look like it going at right angle to this. Don't tell me you cleaned it this way!
It is a smear nothing else. A scratch looks entirely different. Come to think I actually I don't really know what it looks like cause I have never seen one
You have some very small crap still left on the sensor filter. And the filter is not easily scratched it has actually a very hard surface. Do you thing repair shops would take on a cleaning job if the filter was this easily ruined?
Greetings