Moonroof duct clogged: what size?

[NYCSHO]

My moonroof sunroof duct is clogged. Passenger front. I tried compressed air no luck. What size and type wire or trimmer cord should I get to unclog it from the front wheel well?

 

[krewat]

Start small and work your way up. Hair-pin the end of the wire (so it doesn't go through the tubing).

 

[sperold]

The ultimate probe and eventual opener for the tube is an old fashioned speedometer cable. They are so rare now you may have to get a new one, for say an 80s Chev half ton. See if you can get just the inner flex cable rather than the whole thing with the armoured outer sheath.

The obstruction is usually at either end, they never clog in the middle. And more likely near the sunroof itself.