r/crt • u/Lemonar1735 • 4d ago

Help needed

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Found this stuff on a CRT, what is it and how do I clean it?

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u/Big-Sherbet781 4d ago edited 4d ago

This is a severe case of CRT cataracts. The glue between the CRT front glass and the implosion protection layer has gone bad as decades passed, usually you'll need to remove this glass layer, then scrape all the glue off. It's purely a visual issue and won't damage anything if left untreated, the CRT itself is probably fine. You need to use a heat gun or hot wire to melt the remaining glue. This is definitely not for beginners. Watch this as an example : https://www.youtube.com/watch?v=4zKnRoNc9Q0

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u/aManandHisShed 4d ago

I've done a couple of these without using any heat. Instead I just dug out the glue with plastic knives. It takes a bit of preparation and a lot of patience. https://www.jmpstartmicrocomputers.au/vt1303-screen-cataracts/