do you mean I should pry the rubber up a little from the outside and push the glass in?
I think the problem is that the glass isn't set perfectly in the glass channel of the rubber. There was another part that was like that and I just had to push on the glass a couple times with my hands and it set in right. This corner is just a little tougher.
I'll give the toothbrush method a try.
I started by lubing the channel up with soapy water, but I think it all dryed up by the time I got to that corner because it took so long once my strings broke.