Hi and Welcome Back to Just Answer,
I am sorry it has taken so long but I wanted to inquire a little on this
Here is a parts breakdown for your door, as you can see this isn't a easy task.
It is probably trapped between the glass and the FILM-DIFUS
I inquired to a buddy of mine that has worked on Microwave's and he stated that there is no real way to get where you need to get without having to replace seals and bending something out of whack.
He said that it is far safer to just replace the door then it is to try and repair one.
That part number appears to be PS886563 for your model, it is around $165
Here is the site with your parts break down
If you need more help Let me know
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If there is anything else let me know, If not click accept. Thank You Michael L.