On home windows the dual-pane seal used to be waranteed by the manufacturer (this was about 15 years ago, don't have any recent experience). If that's true on our coach windows, you should be able to get more proximate service via that route.
Trek motorhomes went thru a significant window seal failure issue people referred to as "snakes." The seal would get sucked into the space, looking like a snake or randomly ripand worm inside the glass. The manufacturer, IIRC, waranted the problem.
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Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
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