I recently ordered some window glazing from "Airstream Dreams" now called "Vintage Trailer Supply" for my '65 Globtrotter. I pulled the old brittle glazing off, cleaned the little track of all foreign material and then tried to install the glazing. I could not get it to go all the way in. There is about a 1/16" gap under the slopped part. I tried to use dishwashing liquid to allow it to slip in easier, but no luck. Is there a trick to this or what? Any help would be greatly appreciated.