Thank you for that. To do this you need to remove the door completely for best results because it can be very difficult to do this with the door attached to the hinges.
First thing , this shoudl be done ONLY if you feel you are handy enough to do this.
Here is a basic video, Im sorry there isn't one that shows your exact model but it is very similar and shows basically how you access the glass so you can clean it;-)
Please see: https://www.youtube.com/watch?v=skpONuI6N7Q
In any case, I will stick with you until this is complete.
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