As for your problem, here’s the official troubleshooting list for this issue; always a good idea to see if you’ve covered everything on it: https://glowforge.com/support/topic/troubleshooting/wi-fi#glowforge-is-offline
Other things:
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Make sure you’ve cleaned all the places that need cleaning, not just the lens itself: https://glowforge.com/support/topic/cleaning-service-and-moving/cleaning#things-that-need-wiping
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After cleaning, make sure you replaced the lens and mirror in their correct orientations.
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Ambient lighting (too bright) can also confuse the camera, especially if you’re trying to use reflective materials. Turn off any lights near the GF, take your materials out, and try it with just the honeycomb tray.
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Try changing the GF’s wifi channel
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Make sure nothing is obscuring the Glowforge logo on top of the print head (it’s used for camera calibration).
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Check the lid light cable clips: Stuck on scanning during start up