Do you know which part of the dash this noise is coming from? If it is close to the blower motor, I would try removing the blower motor and see if you can feel around in there and get it out.
Otherwise, I need to know which duct from the options below you think it is in and we can get the process for it.
However, I attached the process for the removing the blower motor for your review.
Images (Click to enlarge)
Sunday, March 21st, 2021 AT 4:31 PM