Unable to figure out how to remove wool pile. Mitered Window?

A quick learner from California says:
January 14, 2020
I need to replace wool pile on a few windows. Trying to figure out how to remove wool pile and I am unable to find any way to pull out wool pile. I appear to have mitered windows that is joined at the corner. This is for a sliding window. Picture attached is how all 4 corners look.
Thumbnail of the uploaded file named Window Corner.PNG
Profile picture of Casey
Casey from SWISCO responded:
January 15, 2020
Hello,
We have two videos covering wool pile removal that I'll put below for you to review. Some windows have openings in the corners of the sash that will allow you to easily slide the pile out. Yours doesn't appear to have that, so you'll need to follow our cut-out method to remove your existing weatherstripping. Thank you!
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.